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1. (WO2001005048) STRUCTURE OF A RADIO-FREQUENCY FRONT END

Pub. No.:    WO/2001/005048    International Application No.:    PCT/FI2000/000644
Publication Date: Fri Jan 19 00:59:59 CET 2001 International Filing Date: Fri Jul 14 01:59:59 CEST 2000
IPC: H01Q 1/24
H01Q 1/38
H01Q 9/04
H01Q 23/00
H03D 7/16
H04B 1/28
Applicants: FILTRONIC LK OY
HAGSTRÖM, Panu
Inventors: HAGSTRÖM, Panu
Title: STRUCTURE OF A RADIO-FREQUENCY FRONT END
Abstract:
The invention relates to an integrated structure of a radio-frequency front end of a communications apparatus. The antenna of the communications apparatus is constructed on a printed circuit board. To this antenna board (310), on its ground plane side, a second circuit board (321) is attached by means of a rigid protective frame (410), which second circuit board includes the other parts of the radio-frequency front end. Between the parts impedance levels are used that are appropriate from the electrical operation perspective. All said parts together form an integrated component (400) to be located inside the housing of the communications apparatus. The advantage of the invention is that it requires a smaller number of components needed for matching between the RF parts, and makes possible a greater sensitivity of the receiver as well as a better transmitter efficiency than prior art structures.