Duplex-transmitter receiver arrangement

US4212013A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Gunter Biethan · Schwanau, DE
• Peter Kloeber · Munich, DE

Key dates

• Filing date: Sep 21, 1978
• Grant date: Jul 8, 1980
• Expiry date: Sep 21, 1998

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/408
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A duplex-transmitter-receiver arrangement wherein only a single oscillator is utilized for the transmitter and receiver for a digitally modulated radio communication system wherein each location has a transmitter and receiver and a single oscillator is used for both the transmitter and receiver with a circulator switch connected respectively to the antenna, the receiver and the transmitter with the oscillator in the transmitter coupling through to the branch for the receiver so as to serve as a mixing frequency for the receiver.