Active Antenna HF/VHF/UHF 3-3000MHz


Posted on Feb 6, 2014

This Blog show the Different Electronics Circuit Design, Application, Fields and Resources which could help students, engineers, professionals, and common people whose interest is in electronics! For your comments, suggestions, or your looking for a circuit or design, or a electronics designer, please send you Inquiries to pcb1001@gmail. com. We


Active Antenna HF/VHF/UHF 3-3000MHz
Click here to download the full size of the above Circuit.

are happy to help and attend to your concerns. If you have a shortwave or high-frequency receiver or scanner that is struggling to capture signals with a short, whip antenna, and you`d like the kind of performance that a 60-foot `longwire` antenna can provide but lack the space to put one up, consider building the AA-7 HF/VHF/UHF Active Antenna described in this article. The AA-7 is a relatively simple antenna that is designed to amplify signals from 3 to 3000 MegaHertz, including three recognized ranges: 3-30Mhz high-frequency (HF) signals; 3-300Mhz very-high frequency (VHF) signals; 300-3000MHz ultra-high (UHF) frequency signals. Those bands are typically occupied by shortwave, ham, government, and commercial radio signals. In its simplest form, an active antenna uses a small whip antenna that feeds incoming RF to a pre-amplifier, whose output is then connected to the antenna input of a receiver. Unless specifically designed otherwise, all active antennas are intended for receive-only operation, and thus should not be used with transceivers; transmitting into an active antenna will probably destroy its active components. A well designed broadband active antenna consider field strength of the desired signal (measured in microvolts per meter of antenna length), atmospheric and other noise, diameter of the antenna, radiation resistance, and antenna reactance at various frequencies, plus the efficiency and noise figure of the...




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Emergency Lighting circuit
    Low-distortion-video-buffer
    Dc Motor-Speed Control
    Cheap Motorcycle Alarm
    CPLD Programming
    Signal Chain Basics Audio metering enjoying the VU
    power mosfet circuit
    Neuromorphic Silicon Neuron Circuits
    Medium-Power FM Transmitter
    Video by MAX4102 4103 RF distribution amplifier circuit diagram
    One of the positive and negative brake circuit to operate energy



    Top