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The 10-meter band was allocated on a worldwide basis by the International Radiotelegraph Conference in Washington, DC, on 4 October 1927. [2] Its frequency allocation was then 28-30 MHz. A 300 kHz segment, from 29.700–30.000 MHz, was removed from the amateur radio allocation in 1947 by the International Radio Conference of Atlantic City.
System: Coherent pulse compression (CPC), adaptive moving target detector (AMTD) Band: S band; Range: 75km against 2 square meter RCS aircraft; 12km against 0.1 square meter RCS target; Beam width: 2°(H), 25° (V) Scan coverage: 360°×25° Processing capacity Multiple tracking: ≥20pcs; Antenna Mast weight: 520 kg; Type: Incision parabolic ...
These beacons are DRA5 on 5195 kHz and DK0WCY on 10144 kHz. In addition to identification and location, every 10 minutes, these beacons transmit solar and geomagnetic bulletins. Transmissions are in Morse code for aural reception, RTTY and PSK31. [14] DK0WCY operates also a limited service beacon on 3579 kHz at 0720–0900 and 1600–1900 local ...
The beam direction (direction of greatest sensitivity) is to the left. A Yagi–Uda antenna, or simply Yagi antenna, is a directional antenna consisting of two or more parallel resonant antenna elements in an end-fire array; [1] these elements are most often metal rods (or discs) acting as half-wave dipoles. [2]
Detection range single aircraft Detection range formation Weight First operational Number built Type 3 Mark 6 Model 4 (Type H6) Airborne radar: Yagi type: 2 m: 3 kW: 10: 70 km: 100 km: 110 kg: August 1942: 2,000 Type FM-1: Air and surface search radar: Yagi Type: 2 m: 42 kW: 70 km: 100 km: 70 kg: September 1944: Experimental only Type N6: Air ...
A Yagi antenna may have a reflector on one side of the driven element, and one or more directors on the other side. If all the elements are in a plane, usually only one reflector is used, because additional ones give little improvement in gain, but sometimes additional reflectors are mounted above and below the plane of the antenna on a ...
The "reflector" is the longest dipole element and blocks nearly all the signal coming from behind it, hence a Yagi has no front vs. back directional ambiguity: The maximum signal only occurs when the narrowest end of the Yagi is aimed in the direction from which the radio waves are arriving.
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.