Tuned microstrip antenna and method for tuning

Details Tuned microstrip antenna and method for tuning Tuned microstrip antenna and method for tuning

1994-09-30

1995-10-31

Hajec, Donald

Communications: radio wave antennas

Antennas

Microstrip

343873, 29600, H01Q 138

Patent

active

054634040

ABSTRACT:
A prefabricated and assembled microstrip antenna element has at least one layer of dielectric substrate on which is deposited a metal etched to form a radiating element and over which is attached a protective radome. To compensate for uncontrollable variations in the dielectric constant of the substrate between different lots of material, the resonance frequency of the assembled microstrip is shifted or tuned to a desired resonance frequency by drilling a bore hole of predetermined diameter and location through the radome, metal layer and substrate that removes a predetermined amount of metal from a predetermined location on the radiating element. The bore hole is then filled with a non-conductive epoxy having a dielectric constant approximately equal to that of the substrate.

REFERENCES:
patent: 4089003 (1978-05-01), Conroy
patent: 4218682 (1980-08-01), Yu
patent: 5181025 (1993-01-01), Ferguson et al.
patent: 5400039 (1995-03-01), Araki et al.

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