Antenna switch for wireless antenna diversity telecommunications devices with two antennas

US5933122A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Jürgen Sauer · Munich, DE
• Volker Detering · Nideggen, DE
• Jurgen Lepping · Essen, DE

Key dates

• Filing date: Feb 25, 1997
• Grant date: Aug 3, 1999
• Expiry date: Feb 25, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B7/0831
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In order to minimize switching losses occurring in antenna switches for wireless antenna diversity telecommunications devices with two antennas, for example base station of a DECT cordless telephone, in each case an electronic switching element (SE1 . . . SE4), constructed for example as a PIN diode or switching diode, is arranged in a first signal path (SW1) from a transmitter (TR) to a first transmission/reception antenna (A1), a second signal path (SW2) from the transmitter (TR) to a second transmission/reception antenna (A2), a third signal path (SW3) from a receiver (RE) to the first transmission/reception antenna (A1) and a fourth signal path (SW4) from the receiver (RE) to the second transmission/reception antenna (A2). The switching elements (SE1 . . . SE4) form here, together with the signal paths (SW1 . . . SW4), a ring circuit.