Comparative Effects of Simulated Reentry Wake Plasma on Three Base-Mounted Microwave Antennas.
Final rept. 1 Oct 71-30 Nov 75,
MASSACHUSETTS INST OF TECH CAMBRIDGE AEROPHYSICS LAB
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The effect of a simulated reentry plasma sheath and ionized wake on three types of base-mounted microwave antennas at 1.2 GHz are discussed. Simulation is produced in the MIT Supersonic Wind Tunnel using a pylon-mounted blunt cone model. Microwave antenna are mounted in the model base and a DC arc jet inside the model expels plasma from the model nose. This plasma forms a sheath about the nose and expands behind the model to form a plasma-filled wake. This report presents the results of low and high power tests of three base-mounted antenna types 14 wave monopole mast, annular cavity-backed slot and J-slot. The terminal impedance of the mast was affected most by plasma and the cavity-backed slot least.
- Electrical and Electronic Equipment
- Plasma Physics and Magnetohydrodynamics