Through the-wall motion detector with improved antenna

Details Through the-wall motion detector with improved antenna Through the-wall motion detector with improved antenna

2006-10-11

2010-12-14

Gregory, Bernarr E (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Transmission through media other than air or free space

C342S027000, C342S028000, C342S118000, C342S127000, C342S175000

Reexamination Certificate

active

07852256

ABSTRACT:
A flat panel antenna used at a wall in a through-the-wall CW radar application is spaced from the wall by a half wavelength to eliminate the effects of energy reflected by the wall back to the antenna. In one embodiment, a½-wavelength dielectric absorbing material insert is placed adjacent the flat panel antenna, which allows the flat panel antenna to be pressed against the wall for antenna stabilization, with the index of refraction of the material desirably being 3.

REFERENCES:
patent: 3775765 (1973-11-01), Di Piazza et al.
patent: 4161731 (1979-07-01), Barr
patent: 4670754 (1987-06-01), Zacchio
patent: 4725842 (1988-02-01), Mayberry
patent: 5012248 (1991-04-01), Munro et al.
patent: 1 478 050 (2004-11-01), None
patent: 58035478 (1983-03-01), None
Merrill I. Skolnik, 7.9 Radomes, “Introduction to Radar Systems” 1981, McGraw-Hill, XP007913796, ISBN: 0-07-066572-9, pp. 264-271.

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