Search International and National Patent Collections

1. (WO1994001954) MULTIPLE CAVITY TUNING OF A TRANSMITTER OUTPUT IN A COMMUNICATION SYSTEM

Pub. No.:    WO/1994/001954    International Application No.:    PCT/US1993/005451
Publication Date: Fri Jan 21 00:59:59 CET 1994 International Filing Date: Thu Jun 10 01:59:59 CEST 1993
IPC: H04B 1/713
H04B 1/7136
Applicants: MOTOROLA INC.
Inventors: KOTZIN, Michael, D.
SPEAR, Stephen, L.
Title: MULTIPLE CAVITY TUNING OF A TRANSMITTER OUTPUT IN A COMMUNICATION SYSTEM
Abstract:
A base-site (304) combines baseband frequency hopping and fast-synthesizer hopping to produce an economical frequency hopping communication system (300). The base-site (304) combines the fast-synthesizer frequency hopping capability of transmitters (307-309) with baseband frequency hopping to produce a frequency hopping communication system (300) which serves the same number of subscribers served by transmitters (208-213) in a purely baseband hopping communication system (200), but with fewer transmitters (307-309). The implementation of frequency-selective cavities (312-317) having very low loss eliminates the need for wideband hybrid combiners (112-114), which in turn eliminates transmitted-signal power loss experienced in a purely fast-synthesizer frequency hopping communication system (100).