bi directional

32 links

The extended double zepp - This wire antenna exhibits extraordinarily high gain in a bi directional radiation pattern.
[ Hits: 12408 | Votes: 28 | Rating: 8.11 ]

2 Meter 10 Element Quagi Antenna - This antenna was designed by N6JSX Kuby for Transmitter hiding. Fitting the requirements of directionality, high gain, and portability. This antenna was derived from the ARRL Handbook information on Quagi's and Yagi's; in the absence of two meter Quagi information, UHF Quagi dimensions were scaled into 146 MHz use.
[ Hits: 15656 | Votes: 32 | Rating: 7.06 ]
2m Big Wheel Antenna - A Useful Horizontally Polarised Omni-directional Antenna with Gain for 144 MHz
[ Hits: 1323 | Votes: 4 | Rating: 7.75 ]

Beverage antennas notes - How to build a beverage antenna. How to deploy a BOG antenna for your next SWL DX-ing activity. Give it a try and follow the orientation tips for this bi-directional antenna.
[ Hits: 15827 | Votes: 9 | Rating: 4.56 ]
W0BTU Beverage Receiving Antenna notes - Comprehensive information page about bi-directional Beverages, including applications, construction details, and tips.
[ Hits: 1156 | Votes: 39 | Rating: 9.49 ]

Home-brew Compact 6dBi Collinear Antenna - This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802.11b/g wireless networking.
[ Hits: 20576 | Votes: 29 | Rating: 7.89 ]

J-Pole theory ^pop - The J-Pole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. It does not need a ground plane, radials or a complicated matching system. The J-Pole can be cheaply, simply and quickly constructed using a variety of techniques, some of which are discussed in this article.
[ Hits: 30319 | Votes: 26 | Rating: 6.87 ]

The Lindenblad Antenna: The Ultimate Satellite Omni Directional Aerial - This Antenna project is a bit more complex than other omni antennas for satellite use, but it is much easier and cheaper than a standard tower mounted circular polarized azimuth and elevation rotating beam system.
[ Hits: 442 | Votes: 5 | Rating: 6.8 ]

Rhombic Antennas - Description and simulation of two types of rhombic antennas, using the software 4Nec2: the simple bi-directional and the terminated directional rhombic antenna
[ Hits: 840 | Votes: 1 | Rating: 10 ]

Eggbeater II Omni LEO Antennas - Presented here is a high-performance, circularly polarized omni-directional antenna that is easy to build, easy to tune, inexpensive, and will work all the mode J Low Earth Orbit (LEO) satellites
[ Hits: 2904 | Votes: 2 | Rating: 8.5 ]

Antenna Basics : Directional Antennas - An article describing basic concepts of antenna radiation, and in particular directional antennas like Yagi antennas or Quad antennas and how they determine the direction or signals.
[ Hits: 347 | Votes: 1 | Rating: 2 ]

H Doublebay Antennas - Cheap and EZ to build Bi-Directional VHF & HF antennas with gain
[ Hits: 2200 | Votes: 6 | Rating: 3.67 ]

Vertical end Firen Antenna - A bi-directional vertical antenna with 4db gain over a dipole.
[ Hits: 616 | Votes: 0 | Rating: 0 ]

TX RX Systems Inc - TX RX Systems Inc. manufactures signal boosters, rf antennas, transmitter combiners, cell enhancers, land mobile radios, duplexers, receiver multicouplers, bidirectional amplifiers, bda, rf amplifiers, rf filters, rf cavity filters, rf combiners, rf components, in building rf coverage, repeaters, repeater amplifiers, rf management equipment, rf systems, and rf solutions. TX RX Delivers Reliable Solutions.
[ Hits: 1640 | Votes: 5 | Rating: 4 ]
DCI Digital Communications Inc. - Filters, Duplexers, Combiners Bi-Directional Amps
[ Hits: 793 | Votes: 3 | Rating: 7 ]

SSB Electronic USA - manufactures and distributes HF, VHF, UHF and SHF equipment covering 10MHz. - 47.0GHz. Our products include: Wireless LAN / WAN Bidirectional Linear Amplifiers, Low Noise Preamplifiers - LNA's, RF Linear Amplifiers, Relays, Transverter Systems, Frequency Translation Systems, Downconverters, Antennas, Parabolic Dishes, Coaxial Cable, Relays, Antenna Switches, Microwave Test equipment, PC controlled Receivers, Microwave Linear Amplifiers including models for Telemetry, Wireless, and CDMA applications.
[ Hits: 8406 | Votes: 8 | Rating: 6.12 ]

Anaren - Manufacturer for splitter and combiners, baluns, directional couplers hybrid couplers, modulators, mixers, phase discriminators, antenna feeds.
[ Hits: 393 | Votes: 0 | Rating: 0 ]

Manpack Communications - A complete bi-directional APRS messaging station, made up of a Byonics TT4 with the companion display, Byonics GPS5 receiver, compact keyboard, Baofeng UV-3R+ with a telescopic whip antenna by VE6AB
[ Hits: 621 | Votes: 2 | Rating: 5.5 ]

NPR New Packet Radio - IP over 430 MHz - NPR (New Packet Radio) is a custom amateur radio digital protocol, designed by F4HDK to transport bidirectional IP trafic over radio links on the 70cm band. This IP protocol is optimized for point-to-multipoint topology, with the help of managed-TDMA. Bitrate is up to 500kbps. Home Made modem has a built-in ethernet port to connect to PC. To boost power a DMR amplifier is required to reach 20W. This project is an extension of HSMM - Hamnet - AREDN networks
[ Hits: 151 | Votes: 0 | Rating: 0 ]

Bi-Directional 2.4 GHz Amplifier - Bi-Directional 2.4 GHz One Watt Amplifier With Receive Pre-Amplifier. This will show you how to add a bi-directional, 2.4 GHz amplifier to your Proxim Symphony for under $100
[ Hits: 318 | Votes: 0 | Rating: 0 ]