Communications: radio wave antennas – Antennas – Wave guide type
Patent
1991-04-29
1994-01-11
Lee, Benny T.
Communications: radio wave antennas
Antennas
Wave guide type
343853, 333245, 361707, H01Q 2300, H01Q 336, H05K 700
Patent
active
052785742
ABSTRACT:
A low cost, light weight, high performance phase shifter mounting structure which allows high density packaging of phase control modules for phased array antennas. The mounting structure is a bimetallic sandwich design in the shape of an I-beam having a top flange for mating to radiating elements, a bottom flange for mating to a feed network, and a center web for mounting phase control modules. The I-beam is formed from a single piece of laminated stock comprising an outer layer of aluminum and a core layer of titanium forming an anisotropic thermal expansion composite material. The titanium center web matches the coefficient of thermal expansion of the typical ferrite, MIC, or MMIC phase shifter and driver circuits. The aluminum flange material allows easy machining of microwave transitions at each end of the I-beam and matches the expansion of typical radiating element structure and feed networks. The structure provides improved reliability when the subarray is subjected to repeated and widely ranging thermal cycling.
REFERENCES:
patent: 3274601 (1966-09-01), Blass
patent: 3631501 (1971-12-01), Buscher
patent: 4001834 (1977-01-01), Smith
patent: 4044360 (1977-08-01), Wolfson et al.
patent: 4700273 (1987-10-01), Kaufman
patent: 5075648 (1991-12-01), Roberts et al.
Article by Howard Mansell, "Hybrid Metal Packages By Explosion Bonding" Hybrid Circuit Technology, Sep., 1990, pp. 67-69.
Promotional Literature of Lockhart Industries, Inc., Paramount, Calif. for VACU-CELL, drawings dated Jul., 1990, 22 pages.
Bell Thomas E.
Zimmerman Kurt A.
Electromagnetic Sciences, Inc.
Lee Benny T.
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