uhf frequency

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uhf frequency

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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.
    [ Hits: 74 | Votes: 0 | Rating: 0 ]
Antennas : Log Periodic
  • VHF Log Periodic Antenna - 17-Element Very High Frequency/Ultra High Frequency Log Period Dipole Array
    [ Hits: 1246 | Votes: 7 | Rating: 5.86 ]
Antennas : VHF UHF
  • VHF/UHF Yagi Antenna Design  pop - Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.
    [ Hits: 147431 | Votes: 1105 | Rating: 6.95 ]
Manufacturers : Amplifiers
  • 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: 8404 | Votes: 8 | Rating: 6.12 ]
Manufacturers : Antenna Masts and Mounts
  • Trivalantene - Professional antennas in MF, VHF, UHF and SHF frequency range for military applications, civil-professional market, mobile communications, radioamateurs and antennas for special applications - EMC, radiomonitoring, etc.
    [ Hits: 4768 | Votes: 1 | Rating: 10 ]
Manufacturers : Antennas : HF
  • Valcom Fibreglass Whip Antennas - Manufacturer of Fibreglass Whip Antennas, Low and mediun Frequency, HF and VHF Antennas Specialized in the design and manufacturing of a full range of Beacon (MF), AM Broadcasting 540 - 1700 KHz, HF 1.7 to 30 MHz, VHF 30 to 156 MHz and UHF 200 to 500 MHz antennas.
    [ Hits: 3350 | Votes: 2 | Rating: 8 ]
Manufacturers : Antennas : Marine
  • Sirio Antenne - Antenna for GSM, CB, marine, VHF/UHF, HAM and high frequency 1,9/2,4GHz
    [ Hits: 9507 | Votes: 23 | Rating: 5.72 ]
Manufacturers : Microwave
  • PRO-COMM INC - High power, UHF, L-band, S-band, C-band, microwave frequency amplifier and oscillator devices, pulsed, CW, fixed-tuned, or tunable devices in the range of 600 MHz to 2000 MHz
    [ Hits: 369 | Votes: 0 | Rating: 0 ]
Operating Aids : Beginner's Guides Operating Modes : Repeaters
  • Ham Radio: Using Repeaters - The most basic form of repeater receives communication on one frequency and re-transmits at a different frequency. This is known as duplex communication. Repeaters are generally set up to operate with FM modulation on the amateur bands within the VHF (30 MHZ – 300 MHZ) and UHF frequencies (300 MHZ – 3 GHz). These are generally the frequencies used by handheld and mobile devices.
    [ Hits: 92 | Votes: 1 | Rating: 8 ]
Operating Modes : VHF UHF
  • FM Repeater & Simplex Channel System 70 cm / 2 m / 6 m / 10 m & Offsets - A very useful table with frequencies for HF VHF UHF repeaters including offsets, steps, grouped by country, with special reference to european band plan.
    [ Hits: 830 | Votes: 1 | Rating: 3 ]
  • 40 MHz 8m Band Amateur Radio Exploration - The 8m ISM band, a unique frequency range between 10m and 6m, holds potential for amateur radio enthusiasts, yet it remains largely unallocated. This spectrum offers fertile ground for research and self-training. The author's experience with low-power transmissions and WSPR testing highlights the band's capabilities and the need for a narrow, speech-free amateur allocation to encourage experimentation. Discover the world of 8m ISM radio exploration and its future possibilities.
    [ Hits: 74 | Votes: 1 | Rating: 8 ]
Propagation : Beginner's Guide
  • Exploring the Spectrum From HF to UHF Frequencies - During radio's early days, high frequencies were under 30 MHz due to technical limitations. As understanding grew, components improved, allowing for higher frequencies like VHF and UHF up to 3 GHz. The HF band's long wavelengths provide unique propagation challenges influenced by solar activity. VHF and UHF bands face diffraction and reflection issues but offer diverse applications, from amateur radio to 5G and GPS technologies.
    [ Hits: 75 | Votes: 0 | Rating: 0 ]
Radio Equipment : VHF-UHF Handhelds : TYT MD-2017
  • TYT MD-2017 Review - The MD-2017 is a dual band DMR and Analog handheld transceiver with a frequency range on VHF 136-174 MHz and on UHF 400-480 MHz
    [ Hits: 319 | Votes: 3 | Rating: 4 ]
Radio Scanning : Regional : Europe
  • UK Scanner Frequencies - UK frequency list provide reference table to lister to Police scanner channels UHF VHF, Amateur Repeaters, Ambulance CB Radio CoastGuard Rescue, marine VHF, Military and more.
    [ Hits: 163 | Votes: 1 | Rating: 1 ]
Technical Reference : Preamplifiers
  • General purpose RF Wideband PreAmp - General purpose RF Wideband PreAmp based on BSX-20 transistor with a frequency range 14-550 MHz
    [ Hits: 2405 | Votes: 2 | Rating: 5.5 ]
Technical Reference : Radio Frequency Interference
  • 6m High Pass TVI filter - Are you suffering from TVI? Then why not try this filter for size. It is a three-stage high-pass filter that blocks low-frequency 50MHz signals while letting through UHF TV.
    [ Hits: 1474 | Votes: 2 | Rating: 3 ]
Technical Reference : Repeater
  • Cross Band Repeaters - Crossband Repeating is a process where a Ham transmits one signal on one band (typically UHF), and it is received by another radio with a better antenna/power installation, and re-transmitted (typically on VHF) to another radio system, or a repeater. Everyday examples of cross-band repeaters are repeater receive sites that hear the input signals on 2m and retransmit those signals on a frequency higher than 220 MHz.
    [ Hits: 207 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment : RF Probe
  • RF Probs and Watt meter - This RF probe can be used at High Frequency (HF) or Ultra High Frequency (UHF) on both 50 and 75 ohm coaxial cables.
    [ Hits: 604 | Votes: 1 | Rating: 10 ]
Technical Reference : Transverters
  • 2m to 70cm Transverter Circuit - A 70cm / 432 MHz Transverter Project transverter circuit is an electronic device that converts a radio signal from the 2 meter to the 70 centimeter band and vice versa, allowing a single transmitter/receiver to be used for both bands. It consists of an IF stage, local oscillator, frequency multiplier, and amplifier. The circuit must be designed for minimal signal loss, noise and intermodulation distortion.
    [ Hits: 81 | Votes: 0 | Rating: 0 ]

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