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Paper Thin Leaf Indoor HDTV Antenna - Made in the USA! List Price: $49.99 Sale Price: Too low to display Used From: $98.85  |
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The patent pending Leaf indoor television antenna is a paper thin antenna that connects to your TV and mounts on the wall, behind a picture, or just about anywhere to enable you to receive free over-the-air broadcasts... |
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Leaf Plus HDTV Antenna |
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This high-performance indoor antenna reduces static and increases the beauty of the TV you receive over the air, including HDTV signals. Adjustable/retractable VHF dipoles extend up to 36" to improve reception of channels 2-13... |
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RCA ANT1650R Flat Digital Amplified Indoor TV Antenna List Price: $79.99 Sale Price: $29.99 Used From: $12.69 |
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RCA ANT1650 flat indoor antenna is designed specifically for digital TV signals. Gives more precise directional reception than analog signals to provide consistent performance. Unique patented antenna design eliminates the hassle of manual adjustments by receiving signals from 360 degrees... |
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Winegard Company FL-5000 FlatWave HDTV Indoor Digital Flat Antenna - Made in USA List Price: $39.95 Sale Price: $23.99 Used From: $32.75 |
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Unlock the FREE in your TV with the FlatWave antenna! Ideal for Urban areas, this is Winegard's best performing indoor antenna yet. Enjoy live local broadcast programs in both standard and eye popping HD as they happen – all with no monthly programming fees... |
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RCA ANT121 Indoor Antenna List Price: $14.99 Sale Price: $8.00 Used From: $5.99 |
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UNIVERSAL INDOOR VHF/UHF/FM ANTENNA HDTV COMPATIBLE ADJUSTABLE RETRACTABLE VHF DIPOLES EXTEND UP TO 39" TO IMPROVE RECEPTION OF CHANNELS 2 13UHF LOOP FOR IMPROVED RECEPTION OF CHANNELS 14 69ATTACHED 6-FT 75_ COAXIAL HOOKUP CABLE WITH ;F-CONNECTOR FOR EASY HOOK-UP12-POSITION UHF & VHF FINE-TUNING CONTROL FOR IMPROVED SIGNAL RECEPTIONOFF-AIR RECEPTION OF LOCAL CHANNELS ANALOG OR DIGITAL NO-SCUFF PAD PROTECTS CABINET/TV TOPSMALL BASE FITS MOST SET TOPSUPC : 079000322467Shipping Dimensions : 12... |
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Terk FDTV1A Flat Digital Omni Directional Amplified Indoor Antenna (Black) List Price: $89.99 Sale Price: $18.95 Used From: $21.00 |
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TERK digital flat indoor antenna has a patented reception technology that outperforms traditional antennas. 360 degree reception pattern eliminates the need for constant adjustments. The removeable Extremely Low Noise (ELN) amplifier provides maximum flexibility and performance and gives you outstanding digital TV reception without saturating the signal... |
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Winegard SS-3000 Amplified Indoor UHF/VHF Antenna List Price: $99.95 Sale Price: $41.96 Used From: $30.97 |
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The Winegard SS-3000 is the antenna designed specifically for indoor HDTV signal reception. The attractive, compact antenna fits into any modern home decor. The SS-3000's inchesScatter Plane inches technology effectively deals with multi-path reflected or bounced signals that interfere with signal reception... |
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Antennas Direct CSM1WS ClearStream Micron R Indoor Digital TV Antenna List Price: $79.99 Sale Price: Too low to display Used From: $7.99 |
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Enjoy full 1080 HDTV broadcasts with the clearstream micron-r antennas and reflector. sleek and powerful, this high-performance antenna is engineered to deliver uncompromised indoor, high gain reception... |
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RCA ANT301 Amplified Indoor Antenna $34.49 RCA ANT301 Amplified Indoor Antenna |
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Denon AVR-1912 3D Ready A/V Receiver - 90 W RMS - 7.1 Channel (Refurbished) $439.99 The AVR-1912 boasts an equal amp power design and supports multiple high-resolution audio formats, providing for an absorbing listening experience in surround sound. It also supports HDMI 1.4a, allowing you to get the most out of 3D content. |
Indoor Antenna
Distributed Antenna Systems for Indoor Cellular Network
Some 70 - 80% of mobile traffic originates from inside buildings. This is especially true in urban environments where the focus of the mobile user is on high data rates. For mobile 3G network, only serving macro base station within a few hundred meters of the building can provide sufficient level of RF signal to support indoor voice/data services. In realty, only a few buildings will fall into this category. Soft handover in 3G network will further increase the traffic load on the network since each indoor mobile phone can be serviced by more than one macro cells (base stations). In order to provide indoor high speed mobile data services such as HSPA (High speed Packet Access) or EVDO (Evolution - Data Optimized) services, the only solution is an indoor Distributed Antenna Systems (DAS).
DAS is used to distribute the RF signal evenly with sufficient strength inside a building to provide 3G voice and data services. DAS can be used to isolate the indoor network from the outdoor serving macro cells to eliminate the soft handover of the indoor mobile phone. This will reduce the traffic load and increase the speed of the 3G network. For HSPA high speed data service, indoor DAS can also provide isolation between serving and non-serving cells of the outdoor network. This means less co-channel interference in the HSPA serving cell and results in higher data rate for the HSPA service. To dominate the building with indoor coverage, directional antennas can be deployed at the edge and corners of the building and pointing towards the center of the building. The total indoor area is dominated by the indoor cell and at the same time minimizes leakage to the macro network.
DAS distributes a uniform dominant RF signal inside the building by splitting the signal from the indoor base station to multiple indoor antennas to provide coverage throughout the building. DAS can be classified as passive or active. Passive DAS uses passive components to distribute the RF signal. These passive components are coax cable, splitters, terminators, attenuators, circulators, couplers and filters (duplexer, diplexer or triplexer). Planning DAS includes calculating the maximum loss from base station to each antenna in the systems and does the link budget for the particular area that each antenna covers. The passive DAS design needs to adapt to the limitation of the building regarding the restriction to where and how the heavy coax cable can be installed. A detail site survey of the building needed to be done to make sure that there are cable routes to all antennas.
Active DAS has the ability to automatically compensate for the losses of the cables interconnecting the components in the system by using internal calibrating signals and amplifiers. It does not matter what the distance between the antenna and the base station, all antennas in an active DAS will have the same performance (same noise figure and downlink power). Active DAS consists of a master unit (MU) connected to multiple expansion units (EU) with optical fiber up to 6 km in length. Each EU in turns connects to multiple remote units (RU) with thin coax or CAT5 cable up to 400m in length. The MU controls and monitors the performance of the DAS. The EUs are distributed throughout the building and the RUs are installed close to the antenna. A wideband active DAS can support multiple radio services, GSM, PCS, UMTS, EVDO, WiMax and WiFi.
Due to the loss and attenuation in the coax cable and passive components, passive DAS is only used in smaller building covers by a small number of indoor antennas to keep its degrading impact on HSPA performance to a minimum. For larger building, active DAS is used because it does not have cable and component loss and can boost the HSPA performance to the maximum. Troubleshoot in passive DAS is difficult and any fault in the systems will not raise an alarm at the base station because there is no surveillance of errors in the system. Active DAS monitors all units in the system and in the event of malfunction; it will send an alarm to the base station which enables the operator to pinpoint the source of the problem. Hence, active DAS is the preferred solution for large building with a lot of indoor antennas.
About the Author
Paul Ngai is an engineering consultant specialized in Telecommunications Network and Systems. He is also the principal of Network Systems Technologies LLC, a telecommunications consulting firm provides planning, analysis, design, testing and operation support services.