H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/94
H04B 1/16 (2006.01) G08B 3/10 (2006.01) H01Q 1/24 (2006.01) H04B 1/18 (2006.01)
Patent
CA 1183903
ABSTRACT A paging receiver having a built-in antenna is described. In conventional receivers of this type the effective loop aperture area of the antenna is reduced by proximity to the antenna of a metal member forming part of the receiver, which metal member is maintained at a potential equal to the ground potential of the antenna. This means a reduction in gain. To overcome this problem the receiver of the invention has a higher frequency operative cir- cuit section associated with the antenna circuit and a lower frequency operative circuit section. The receiver also has a high impedance circuit for connecting the two operative sections. The high impedance circuit exhibits a high impedance to the higher frequency so that the ground line of the lower frequency operative circuit section has a high impedance to the loop antenna. This increases the effective loop aperture area of the antenna thus improving the gain.
403119
Ishii Daisuke
Nagata Koichi
Nippon Electric Co. Ltd.
Smart & Biggar
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