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Antennas : Horn

• What is Horn Antenna - Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
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• Designing VHF/UHF Quad Antenna - The information in this article has come from many amateur sources, the most notable was from WA6TEY (sk 1985) Ray Frost, who was a pioneer of VHF Quad designs and one of the best Southern California Transmitter Hunters. Ray built hundreds two meter quads in single and paired configurations as well as his famous mobile radio direction finding quad.
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• Loma Pioneer Repeater Club - LPRC - The loma pioneer repeater club - lprc provides 2 meter vhf and 440 uhf amateur radio and emergency communication for the san francisco and monterey bay areas from a repeater on mt loma prieta. aprs digipeater available.
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• K6ARP - The Clovis Amateur Radio Pioneers is a non-profit Amateur Radio Club located in Clovis, California
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• K6ARP - Clovis Amateur Radio Pioneers, Clovis, CA
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• W8CTT Pioneer Amateur Radio Fellowship - Serving Akron, Ohio, Summit County and the surrounding area since 1981
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• W7SP Utah Amateur Radio Club - Our club is the oldest and largest amateur radio club in the state of Utah. It holds the call W7SP, a memorial call for Leonard (Zim) Zimmerman, early UARC member and radio pioneer
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• WiNRADiO Communications - Pioneering the integration of radio and personal computing, WiNRADiO Communications are the manufacturers of award-winning range of computer-controlled WiNRADiO receivers for professional and amateur applications.
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• AEA - AEA Technology Inc. is a pioneer and leading manufacturer of RF and cable test equipment for the wireless, Telco, CATV, NMR & MRI, RFID, telemetry, aviation, commercial, military, and two-way radio industries. Produces SWR Meters, Pre Amplifiers, filters, power meters and antenna testing products
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• ZTEC Instruments - ZTEC Instruments is a pioneering modular instrument company whose product focus is oscilloscopes and function generators.
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• Neidlinger : radio and electronic pioneers - Historic profiles of ham radio and electronic famous inventors and pioneers
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• K3PGP Experimenter's Corner - Covers experimental work from VLF through laser by K3PGP, one of the EME pioneers.
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• Herbach & Rademan - Pioneer supplier in the radio parts field, and electronic components, alternative power products, kits, test equipment and computer components.
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• Station QRP - Station QRP is a free low power pioneer shortwave radio station on 6.925 kHz AM
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