Quasi-optic amplifier with slot and patch antennas

Details Quasi-optic amplifier with slot and patch antennas Quasi-optic amplifier with slot and patch antennas

1993-10-13

1995-02-21

Hellner, Mark

Optical: systems and elements

Optical amplifier

330286, 342175, H01Q 1326

Patent

active

053921526

ABSTRACT:
A monolithic quasi-optic amplifier is provided for co-linear beam propagation in the millimeter wave frequency range (30-300 GHz). The amplifier comprises a multiplicity of unit cells that act as nearly independent amplifiers. Each unit cell includes a GaAs transistor, a slot antenna, a patch antenna, a microstrip line, and a DC bias provided by a ground plane that routes non-radiating transmission lines without interference. The slot antennas on GaAs provide preferential directionality in receiving the input waves. A vertically polarized input wave couples energy into each unit cell through the slots in the ground plane, through the microstrip lines, and to the base of each transistor. After amplification by the transistors, the signal is fed to the patch antennas, which generate a horizontally polarized output wave. The size of each patch antenna, which is determined by the operating frequency, is approximately 1 mm by 1 mm in GaAs at 44 GHz.

REFERENCES:
patent: 4588962 (1986-05-01), Saito et al.
patent: 5115245 (1992-05-01), Wen et al.
patent: 5214394 (1993-05-01), Wong
patent: 5266963 (1993-11-01), Carter

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