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2. Dummy load - Wikipedia

   en.wikipedia.org/wiki/Dummy_load

   A dummy load is a device used to simulate an electrical load, usually for testing purposes.In radio a dummy antenna is connected to the output of a radio transmitter and electrically simulates an antenna, to allow the transmitter to be adjusted and tested without radiating radio waves.

3. AN/URM-25 signal generator - Wikipedia

   en.wikipedia.org/wiki/AN/URM-25_signal_generator

   The AN/URM-25 was part of a series of vacuum tube-based signal generators built for the U.S. military in the early Cold War-era.. Today they are collected and used by vintage amateur radio and antique radio enthusiasts who say they provide reasonably high accuracy and stability for a low cost, with build quality reflecting tough military construction requirements and standards.

4. AN/PRC-160 - Wikipedia

   en.wikipedia.org/wiki/AN/PRC-160

   The PRC-160 is the manpack HF radio for the Harris Falcon III family of radios. It replaces the earlier AN/PRC-150 , with a smaller form factor and lighter weight than its predecessor, and being capable of 4th Generation Automatic Link Establishment (4G ALE), achieving data transmission speeds up to 10 times faster.

5. WSPR (amateur radio software) - Wikipedia

   en.wikipedia.org/wiki/WSPR_(amateur_radio_software)

   The program is designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands. WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Transmissions carry a station's callsign, Maidenhead grid locator, and transmitter power in dBm.

6. Power dividers and directional couplers - Wikipedia

   en.wikipedia.org/wiki/Power_dividers_and...

   Directional couplers and power dividers have many applications. These include providing a signal sample for measurement or monitoring, feedback, combining feeds to and from antennas, antenna beam forming, providing taps for cable distributed systems such as cable TV, and separating transmitted and received signals on telephone lines.

7. AN/PRC-150 - Wikipedia

   en.wikipedia.org/wiki/AN/PRC-150

   The AN/PRC-150(C) Falcon II Manpack Radio, is a tactical HF-SSB/ VHF-FM manpack radio manufactured by Harris Corporation. [1] It holds an NSA certification for Type 1 encryption . [ 2 ] The PRC-150 is the manpack HF radio for the Harris Falcon II family of radios, introduced in the early 2000s.

8. Directional antenna - Wikipedia

   en.wikipedia.org/wiki/Directional_antenna

   Patch antenna gain pattern. A directional antenna or beam antenna is an antenna which radiates or receives greater radio wave power in specific directions. Directional antennas can radiate radio waves in beams, when greater concentration of radiation in a certain direction is desired, or in receiving antennas receive radio waves from one specific direction only.

9. Adaptive beamformer - Wikipedia

   en.wikipedia.org/wiki/Adaptive_beamformer

   Beamforming is spatial signal processing which makes spatial beam focused on the target direction and spatial beam nulled interference signal. Smart Antennas is multiple antenna systems having one of three structures which are single-input and multiple-output (SIMO), multiple-input and single-output (MISO), and multiple-input and multiple ...