tag:blogger.com,1999:blog-22162967512289428692024-02-19T17:55:31.175-08:00Satellite dishSamanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-2216296751228942869.post-89218575100367409332021-02-23T17:27:00.001-08:002021-02-23T17:27:15.511-08:0025)Simply no Motorcycle Stunts, no Primary Guest: Several First Time Mademoiselle at Republic Day 2021
<a href="https://indiarepublicday.com/"><b>India Republic Day</b></a> -- This year's grand celebration will not be the same as it is at last that it will be held amongst the ongoing coronavirus pandemic, that has claimed many lives throughout the country.
India is celebrating its 72nd Republic Day with Tuesday, but this year's grand parade will not be the same as it is for the first time that it will always be held amid the ongoing coronavirus pandemic, which has claimed several lives across the country.
Burj Khalifa Lights up With Tricolour to identify India's 72nd Republic Day time
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After more than 5 decades, typically the country's 72nd R-Day celebration will have no chief invitees. British Prime Minister Boris Johnson was due to be in New Delhi as the key guest at the annual celebration to mark the Republic Day but he had to be able to call off the visit to concentrate on the domestic crisis unleashed by the emergence of a new, deadlier variant of coronavir
us in the UK at the end of last year.
In addition to, gravity-defying stunts by motorcycle-borne men, a major attraction for the crowd at Republic Day time celebrations on the Rajpath, will probably be missing this year. The viewer size too has been lowered to 25, 000.
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Aside from these, the parade regarding gallantry awardees and little ones who have earned bravery accolades will also not be there with the 72nd Republic Day event, on account of social distancing.
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That year's Republic Day is rather different as it is happening amongst the coronavirus pandemic. Such as Independence Day, all ergonomic chairs in enclosures will be inserted following social distancing best practice rules. So the crowd size offers come down to 25, 000 this time from around 1 ) 25 lakh last year or some of the previous years. The volume of enclosures has also been halved to just 19,'said a senior official
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Dubai's Burj Khalifa on Tuesday ignited up in the tricolour instructions saffron, white and environment friendly with the 24-spoked Ashok Chakra, to mark the 72nd Republic Day of Of india. 'Vijayi Vishwa Tiranga Pyara…Jhanda Ooncha Rahe Hamara.. what a mesmerising feeling to see the Tricolor on #BurjKhalifa within the occasion of 72nd #republicday2021 echoing ever-growing relations involving UAE & India (sic),'tweeted the Native indian Embassy.
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#BurjKhalifa commemorates India's Republic Day, honouring typically the date in which the Constitution regarding India came into effect inside 1950. pic. twitter. com/AgijyRZDKP Also Read - UAE's Space Probe 'Hope' Directs First Image of Mars to National Space Business
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India showcases its navy hardware with a parade yearly on Republic Day, which usually marks the adoption regarding its constitution in 1950. India and the United Arab-speaking Emirates (UAE) enjoy solid bonds of friendship according to age-old cultural, religious in addition to economic ties between the 2 nations.
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Earlier this month, / Muraleedharan, Minister of Status for External Affairs, had embarked on a three-day visit to UAE during which he placed talks on various bilateral and international issues regarding mutual interest.
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Both countries have maintained close dexterity in the spirit of their extensive strategic partnership during the COVID-19 pandemic.
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Moreover, continuing using this type of friendship, a new Hindu forehead located at Jebel Ali in UAE is likely to available for visitors around Diwali in October next year.
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Raju Shroff, who is one of the trustees of the Sindhi Guru Darbar Temple, said that the temple's architecture will have a distinct Arabian aesthetics and will be home to be able to 11 Hindu deities.Samanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.com0tag:blogger.com,1999:blog-2216296751228942869.post-88305710802014357142021-01-12T02:04:00.001-08:002021-01-12T02:04:13.428-08:00How to Use YouTube to Optimize Your WebsiteCreate great <a href="https://theadvertorial.com/">advertorial</a> layouts. In today's information-overload world, it seems that humans have become able to absorb advertising messages so rapidly. This may be a cause for the popularity of short form video advertisements. Furthermore, it is also why you should capture the attention of your audience fast for them to even glance at your video ad. <br /><br />When planning your next marketing campaign, try to come up with a concept that will not only grab your viewers' attention but also make them return for more. One idea is to create thumbnail images for your advertorial and then use these images as part of your regular video series. In this way, you will be able to draw in a greater response from your viewers. Of course, the success of your campaign will also depend on how good you are at making effective use of the images you create for your advertorials and other offline and online marketing campaigns. <br /><br />How to create thumbnail images for your advertorials? The first step is to write your article. You should always begin by writing an article that is interesting to read. Provide your readers with valuable information. At the end of the article, you can recommend some products or services that would be good additions to their search engine results. For instance, if you are going to write about SEO, you can include a couple of keyword phrases that you think would be good for search engine optimization. <br /><br /><div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPsnWPz1n2gPNgrvQY6D-Wd8qWFI75I2m_W5686DHHBq6JpvegYx8S1fY3Vkrn-xsLMG0-T_RprHbhT_2CfEz25eRg42z-aiDLjx9lamkUwJRVAxmoFzAN1FAYkOsgLN_tRAF0F7MYabM/"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPsnWPz1n2gPNgrvQY6D-Wd8qWFI75I2m_W5686DHHBq6JpvegYx8S1fY3Vkrn-xsLMG0-T_RprHbhT_2CfEz25eRg42z-aiDLjx9lamkUwJRVAxmoFzAN1FAYkOsgLN_tRAF0F7MYabM/" /></a></div><br />Once you have written your article, you should upload it to a video distribution service. You can either do this yourself or hire someone to help you with this process. Once the video has been uploaded on YouTube, you can set up a YouTube channel. You can either use your own website or a free blog as the platform for your YouTube channel. By setting up a YouTube channel, you will be able to host your article and create thumbnail images for your regular video series. <br /><br />In order to create thumbnail images, you need two things: high quality photographs and high quality video files. When you upload your images to YouTube, they will be published directly to the site. Because of this, you will want to ensure that you are uploading high quality videos. If your videos aren't of the best quality, your audience will be able to tell the difference. For instance, a low resolution image will look far more grainy than a high resolution image. Another thing to remember is that the quality of your images and videos will affect the response you receive from your audience. <br /><br />There are many tools available to help you create thumbnails. One of these tools is the Advanced Tool to Create Thumbs. This tool is great for those who know how to create images and want to do it quickly and easily. <br /><br />The Advanced Tool to Create Thumblights is not only useful for uploading images to YouTube, but it can also be used when you are publishing certain types of content on social media sites. For example, if you are writing articles and submitting them to social media sites such as Facebook, you can include a link to your website in the article and then create thumbnail images by cropping the area around the link. This will allow your viewers to see your website even when they are on a social media network. Additionally, by creating thumbnail images for your readers, you will be encouraging them to click on the link to visit your website. <br /><br />So, if you want to ensure that your viewers always get a link to your website, then you should consider posting images to YouTube. Also, if you have a blog or an online portfolio, then you can create thumbnail images with the Advanced Tool to Create Thumbers and then share them on social media sites such as Facebook and Twitter. Also, if you want to promote your business using social media sites, then you should consider posting images to your social media pages such as Facebook and Twitter. By doing so, you will be able to get more views for your page. So, the next time you write a blog post, create a link on the bottom of the blog post for your website, and encourage your readers to click on that link to visit your website. <br /> Samanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.com0tag:blogger.com,1999:blog-2216296751228942869.post-12131535016404160012020-08-27T03:03:00.011-07:002020-08-27T03:03:53.323-07:00Satellite dish<img alt="" class="thumbimage" data-file-height="511" data-file-width="544" decoding="async" height="207" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Satellite_dish_1_C-Band.jpg/220px-Satellite_dish_1_C-Band.jpg" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Satellite_dish_1_C-Band.jpg/330px-Satellite_dish_1_C-Band.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Satellite_dish_1_C-Band.jpg/440px-Satellite_dish_1_C-Band.jpg 2x" width="220"/><br/><br/><br/><p>A <b>satellite dish</b> is a dish-shaped type of parabolic antenna designed to receive or transmit information by radio waves to or from a communication satellite. The term most commonly means a dish used by consumers to receive direct-broadcast satellite television from a direct broadcast satellite in geostationary orbit.
</p>Samanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.com0tag:blogger.com,1999:blog-2216296751228942869.post-20660794930390282020-08-27T03:03:00.009-07:002020-08-27T03:03:49.045-07:00Principle of operation<img alt="" class="thumbimage" data-file-height="1820" data-file-width="850" decoding="async" height="471" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Parabolic_antenna_types2.svg/220px-Parabolic_antenna_types2.svg.png" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Parabolic_antenna_types2.svg/330px-Parabolic_antenna_types2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Parabolic_antenna_types2.svg/440px-Parabolic_antenna_types2.svg.png 2x" width="220"/><br/><br/><br/><p>The parabolic shape of a dish reflects the signal to the dish’s focal point. Mounted on brackets at the dish's focal point is a device called a feedhorn. This feedhorn is essentially the front-end of a waveguide that gathers the signals at or near the focal point and 'conducts' them to a low-noise block downconverter or LNB. The LNB converts the signals from electromagnetic or radio waves to electrical signals and shifts the signals from the downlinked C-band and/or K<sub>u</sub>-band to the L-band range. Direct broadcast satellite dishes use an LNBF, which integrates the feedhorn with the LNB. A new form of omnidirectional satellite antenna, which does not use a directed parabolic dish and can be used on a mobile platform such as a vehicle was announced by the University of Waterloo in 2004.
</p><p>The theoretical gain (directive gain) of a dish increases as the frequency increases. The actual gain depends on many factors including surface finish, accuracy of shape, feedhorn matching. A typical value for a consumer type 60 cm satellite dish at 11.75 GHz is 37.50 dB.
</p><p>With lower frequencies, C-band for example, dish designers have a wider choice of materials. The large size of dish required for lower frequencies led to the dishes being constructed from metal mesh on a metal framework. At higher frequencies, mesh type designs are rarer though some designs have used a solid dish with perforations.
</p><p>A common misconception is that the LNBF (low-noise block/feedhorn), the device at the front of the dish, receives the signal directly from the atmosphere. For instance, one BBC News downlink shows a "red signal" being received by the LNBF directly instead of being beamed to the dish, which because of its parabolic shape will collect the signal into a smaller area and deliver it to the LNBF.
</p><p>Modern dishes intended for home television use are generally 43 cm (18 in) to 80 cm (31 in) in diameter, and are fixed in one position, for Ku-band reception from one orbital position. Prior to the existence of direct broadcast satellite services, home users would generally have a motorised C-band dish of up to 3 m in diameter for reception of channels from different satellites. Overly small dishes can still cause problems, however, including rain fade and interference from adjacent satellites.
</p>Samanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.com0tag:blogger.com,1999:blog-2216296751228942869.post-56007068880311033192020-08-27T03:03:00.007-07:002020-08-27T03:03:45.731-07:00Europe<img alt="" class="thumbimage" data-file-height="1895" data-file-width="1323" decoding="async" height="229" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/160px-Antenne-toroidale.jpg" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/240px-Antenne-toroidale.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/320px-Antenne-toroidale.jpg 2x" width="160"/><br/><br/><br/><p>In Europe, the frequencies used by DBS services are 10.7–12.75 GHz on two polarisations H (Horizontal) and V (Vertical). This range is divided into a "low band" with 10.7–11.7 GHz, and a "high band" with 11.7–12.75 GHz. This results in two frequency bands, each with a bandwidth of about 1 GHz, each with two possible polarizations. In the LNB they become down converted to 950–2150 MHz, which is the frequency range allocated for the satellite service on the coaxial cable between LNBF and receiver. Lower frequencies are allocated to cable and terrestrial TV, FM radio, etc. Only one of these frequency bands fits on the coaxial cable, so each of these bands needs a separate cable from the LNBF to a switching matrix or the receiver needs to select one of the 4 possibilities at a time.<i><span title="This claim needs references to reliable sources. (September 2009)">citation needed</span></i>
</p>Samanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.com0tag:blogger.com,1999:blog-2216296751228942869.post-35564774104396723362020-08-27T03:03:00.005-07:002020-08-27T03:03:42.631-07:00Systems design<img alt="" class="thumbimage" data-file-height="1895" data-file-width="1323" decoding="async" height="229" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/160px-Antenne-toroidale.jpg" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/240px-Antenne-toroidale.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/320px-Antenne-toroidale.jpg 2x" width="160"/><br/><br/><br/><p>In a single receiver residential installation there is a single coaxial cable running from the receiver set-top box in the building to the LNB on the dish. The DC electric power for the LNB is provided through the same coaxial cable conductors that carry the signal to the receiver. In addition, control signals are also transmitted from the receiver to the LNB through the cable. The receiver uses different power supply voltages (13 / 18 V) to select vertical / horizontal antenna polarization, and an on/off pilot tone (22 kHz) to instruct the LNB to select one of the two frequency bands. In larger installations each band and polarization is given its own cable, so there are 4 cables from the LNB to a 'multiswitch' switching matrix, which allows the connection of multiple receivers to the multiswitch in a star topology using the same signalling method as in a single receiver installation.<i><span title="This claim needs references to reliable sources. (September 2009)">citation needed</span></i>
</p><p>A satellite finder may aid in aiming the satellite dish. Professional satellite meters allow better dish alignment and provide received signal parameter values too.
</p>Samanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.com0tag:blogger.com,1999:blog-2216296751228942869.post-5563438205249455312020-08-27T03:03:00.003-07:002020-08-27T03:03:38.342-07:00Types<img alt="" class="thumbimage" data-file-height="1895" data-file-width="1323" decoding="async" height="229" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/160px-Antenne-toroidale.jpg" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/240px-Antenne-toroidale.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Antenne-toroidale.jpg/320px-Antenne-toroidale.jpg 2x" width="160"/><br/><br/><br/><h3><span class="mw-headline" id="Motor-driven_dish">Motor-driven dish</span><span class="mw-editsection"><span class="mw-editsection-bracket"></span>edit<span class="mw-editsection-bracket"></span></span></h3><p>A dish that is mounted on a pole and driven by a stepper motor or a servo can be controlled and rotated to face any satellite position in the sky.
There are three competing standards: DiSEqC, USALS, and 36 V positioners. Many receivers support all of these standards.
</p><p>Motor-driven dishes are popular with enthusiasts.
Although there is no problem with equipment pricing, only price for space required for installation.
And making the installation wind proof for big size dish.
Even standard or small size dishes can be used, however enthusiasts tend to prefer the largest possible sizes (at least 120cm) in order to receive signals from remote weak satellite positions.
The cheapest sizes for K<sub>u</sub> band are up to 120cm.
Sizes above 120cm have rapid sharp price increase in comparison to ordinary commercial application for end consumer (ordinary viewer).
Although pricing is different for countries where there is no freedom for K<sub>u</sub> band, and end consumer (ordinary viewer) is only allowed to receive channels from C band, which require in most cases sizes 150cm and above.
</p><p>What needs to be noted DiSEqC or USALS allows to switch automatically between 16 satellite positions as user changes channel on remote control.
</p><p>What is more, mounting dish with USALS motor requires just to find and precisely aim at 1st position, all the other satellites positions are found and aimed automatically.
And if position are close it can be done within seconds.
</p><p>Most of receiver sold nowadays are compatible with USALS and DiSEqC 1.0 and 1.2, DiSEqC 1.1 is least popular.
</p><h3><span class="mw-headline" id="Multi-satellite">Multi-satellite</span><span class="mw-editsection"><span class="mw-editsection-bracket"></span>edit<span class="mw-editsection-bracket"></span></span></h3><p>Every standard size dish enables simultaneous reception from multiple different satellite positions without re-positioning the dish, just by adding additional LNB or using Special Duo LNB or Triple or Four Feed Monoblock LNB.
However some designs much more effectively optimize simultaneous reception from multiple different satellite positions without re-positioning the dish. The vertical axis operates as an off-axis concave parabolic concave hyperbolic Cassegrain reflector, while the horizontal axis operates as a concave convex Cassegrain. The spot from the main dish wanders across the secondary, which corrects astigmatism by its varying curvature. The elliptic aperture of the primary is designed to fit the deformed illumination by the horns. Due to double spill-over, this makes more sense for a large dish.
</p><p>What needs to be noted such switching between satellites is possible by using DiSEqC switches added to installation or built in Duo LNBs or Monoblock LNBs.
</p><p>Most receivers sold nowadays are compatible with at least DiSEqC 1.0 which allows to switch automatically between 4 satellites (all of contemporary Monoblock LNBs), as user changes channel on remote control.
</p><p>DiSEqC 1.1 allows to switch automatically between 16 satellite positions or more (through cascading switches).
</p><p>Motor-driven dish assures better - optimal focusing for the given dish size, LNB is always in central alignment with broadcasting satellite, but DiSEqC switches are faster than DiSEqC motors as no physical movement is required.
</p><h3><span class="mw-headline" id="VSAT">VSAT</span><span class="mw-editsection"><span class="mw-editsection-bracket"></span>edit<span class="mw-editsection-bracket"></span></span></h3><p>A common type of dish is the very small aperture terminal (VSAT). This provides two way satellite internet communications for both consumers and private networks for organizations. Today most VSATs operate in K<sub>u</sub> band; C band is restricted to less populated regions of the world. There is a move which started in 2005 towards new K<sub>a</sub> band satellites operating at higher frequencies, offering greater performance at lower cost. These antennas vary from 74 to 120 cm (29 to 47 in) in most applications though C-band VSATs may be as large as 4 m (13 ft).
</p><h3><span class="mw-headline" id="Others">Others</span><span class="mw-editsection"><span class="mw-editsection-bracket"></span>edit<span class="mw-editsection-bracket"></span></span></h3><ul><li>Individual dishes serving one dwelling: Direct to Home (DTH).</li>
<li>Collective dishes, shared by several dwellings: satellite master antenna television (SMATV) or communal antenna broadcast distribution (CABD).</li>
<li>Automatic Tracking Satellite Dish</li></ul><ul class="gallery mw-gallery-traditional">
<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:35px auto;"><img alt="" data-file-height="2304" data-file-width="3456" decoding="async" height="80" src="//upload.wikimedia.org/wikipedia/en/thumb/1/11/Satellitedish1.JPG/120px-Satellitedish1.JPG" srcset="//upload.wikimedia.org/wikipedia/en/thumb/1/11/Satellitedish1.JPG/180px-Satellitedish1.JPG 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/1/11/Satellitedish1.JPG/240px-Satellitedish1.JPG 2x" width="120"/></div></div>
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<p>General Electric satellite dish for DirecTV satellite television.
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<li class="gallerybox" style="width: 155px"><div style="width: 155px">
<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><img alt="" data-file-height="490" data-file-width="466" decoding="async" height="120" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Sky_minidish.JPG/114px-Sky_minidish.JPG" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Sky_minidish.JPG/171px-Sky_minidish.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Sky_minidish.JPG/228px-Sky_minidish.JPG 2x" width="114"/></div></div>
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<p>Sky "minidish".
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<div class="thumb" style="width: 150px;"><div style="margin:35px auto;"><img alt="" data-file-height="2304" data-file-width="3456" decoding="async" height="80" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Dishing_out_the_truth.JPG/120px-Dishing_out_the_truth.JPG" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Dishing_out_the_truth.JPG/180px-Dishing_out_the_truth.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Dishing_out_the_truth.JPG/240px-Dishing_out_the_truth.JPG 2x" width="120"/></div></div>
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<p>Satellite dishes installed on an apartment complex.
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<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><img alt="" data-file-height="602" data-file-width="581" decoding="async" height="120" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/88/Back_of_satellite_dish.jpg/116px-Back_of_satellite_dish.jpg" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/88/Back_of_satellite_dish.jpg/174px-Back_of_satellite_dish.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/88/Back_of_satellite_dish.jpg/232px-Back_of_satellite_dish.jpg 2x" width="116"/></div></div>
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<p>The back side of an old C-band satellite dish showing the pole, mount, motor, and structure of the dish.
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<div class="thumb" style="width: 150px;"><div style="margin:35px auto;"><img alt="" data-file-height="1896" data-file-width="2848" decoding="async" height="80" src="//upload.wikimedia.org/wikipedia/en/thumb/e/e7/WWE_TRUCK.JPG/120px-WWE_TRUCK.JPG" srcset="//upload.wikimedia.org/wikipedia/en/thumb/e/e7/WWE_TRUCK.JPG/180px-WWE_TRUCK.JPG 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/e/e7/WWE_TRUCK.JPG/240px-WWE_TRUCK.JPG 2x" width="120"/></div></div>
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<p>WWE HD trucks in a parking lot.
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<div class="thumb" style="width: 150px;"><div style="margin:30px auto;"><img alt="" data-file-height="720" data-file-width="960" decoding="async" height="90" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a8/06-06-2014_Fonte_de_Agua_em_Dato_Rua%2C_Fohorem_6.jpg/120px-06-06-2014_Fonte_de_Agua_em_Dato_Rua%2C_Fohorem_6.jpg" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a8/06-06-2014_Fonte_de_Agua_em_Dato_Rua%2C_Fohorem_6.jpg/180px-06-06-2014_Fonte_de_Agua_em_Dato_Rua%2C_Fohorem_6.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a8/06-06-2014_Fonte_de_Agua_em_Dato_Rua%2C_Fohorem_6.jpg/240px-06-06-2014_Fonte_de_Agua_em_Dato_Rua%2C_Fohorem_6.jpg 2x" width="120"/></div></div>
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<p>Satellite dish at a hut in East Timor
</p>
</div>
</div></li>
</ul><h3><span class="mw-headline" id="Homemade_dishes">Homemade dishes</span><span class="mw-editsection"><span class="mw-editsection-bracket"></span>edit<span class="mw-editsection-bracket"></span></span></h3><p>Any metal surface which concentrates a significant fraction of the reflected microwaves at a focus can be used as a dish antenna, at a lower gain. This has led to trash can lids, woks, and other items being used as "dishes". Only modern low noise LNBs and the higher transmission power of DTH satellites allows a usable signal to be received from such inefficient DIY antennas.
</p>Samanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.com0tag:blogger.com,1999:blog-2216296751228942869.post-62661399999454311022020-08-27T03:03:00.001-07:002020-08-27T03:03:35.260-07:00History<br/><br/><br/><p>Parabolic antennas referred to as "dish" antennas had been in use long before satellite television. The term "satellite dish" was coined in 1978 during the beginning of the satellite television industry, and came to refer to dish antennas that send and/or receive signals from communications satellites. Taylor Howard of San Andreas, California adapted an ex-military dish in 1976 and became the first person to receive satellite television signals using it.
</p><p>The first satellite television dishes were built to receive signals on the C-band analog, and were very large. The front cover of the 1979 Neiman-Marcus Christmas catalog featured the first home satellite TV stations on sale. The dishes were nearly 20 feet (6.1 m) in diameter. The satellite dishes of the early 1980s were 10 to 16 feet (3.0 to 4.9 m) in diameter and made of fiberglass with an embedded layer of wire mesh or aluminum foil, or solid aluminum or steel.
</p><p>Satellite dishes made of wire mesh first came out in the early 1980s, and were at first 10 feet (3.0 m) in diameter. As the front-end technology improved and the noise figure of the LNBs fell, the size shrank to 8 feet (2.4 m) a few years later, and continued to get smaller reducing to 6 feet (1.8 m) feet by the late 1980s and 4 feet (1.2 m) by the early 1990s. Larger dishes continued to be used, however. In December 1988 Luxembourg's Astra 1A satellite began transmitting analog television signals on the K<sub>u</sub> band for the European market. This allowed small dishes (90 cm) to be used reliably for the first time.
</p><p>In the early 1990s, four large American cable companies founded PrimeStar, a direct broadcasting company using medium power satellites. The relatively strong K<sub>u</sub> band transmissions allowed the use of dishes as small as 90 cm for the first time. On 4 March 1996 EchoStar introduced Digital Sky Highway (Dish Network). This was the first widely used direct-broadcast satellite television system and allowed dishes as small as 20 inches to be used. This great decrease of dish size also allowed satellite dishes to be installed on vehicles. Dishes this size are still in use today. Television stations, however, still prefer to transmit their signals on the C-band analog with large dishes due to the fact that C-band signals are less prone to rain fade than K<sub>u</sub> band signals.
</p>Samanthahttp://www.blogger.com/profile/07459271527969209994noreply@blogger.com0