Antenna switching in a communication circuit
First Claim
1. A communication circuit, comprising:
- a first radio frequency (RF) signal path configured to transmit a first RF signal during an assigned transmit (TX) period and receive a second RF signal during an assigned receive (RX) period temporally distinct from the assigned TX period;
a second RF signal path configured to receive the second RF signal during the assigned RX period; and
an antenna switching circuit comprising a first antenna switch, a second antenna switch, and a third antenna switch and configured to;
close the first antenna switch, open the second antenna switch, and open the third antenna switch to transmit the first RF signal in a first RF band during the assigned TX period via a first antenna;
close the first antenna switch, open the second antenna switch, and open the third antenna switch to transmit the first RF signal in a second RF band during the assigned TX period via the first antenna;
open the first antenna switch, close the second antenna switch, and open the third antenna switch to transmit the first RF signal in the first RF band during the assigned TX period via a second antenna;
open the first antenna switch, close the second antenna switch, and open the third antenna switch to transmit the first RF signal in the second RF band during the assigned TX period via the second antenna;
close the first antenna switch to receive concurrently the second RF signal in the first RF band and the second RF band during the assigned RX period via the first antenna;
close the third antenna switch to receive concurrently the second RF signal in the first RF band and the second RF band during the assigned RX period via the second antenna; and
decouple the second RF signal path from the second antenna during the assigned RX period in response to the first RF signal path being coupled to the second antenna.
2 Assignments
0 Petitions
Accused Products
Abstract
Aspects disclosed in the detailed description include antenna switching for a communication circuit. A communication circuit includes an antenna switching circuit that couples the communication circuit to a first antenna and/or a second antenna for radio frequency (RF) signal transmission and reception. The antenna switching circuit is configured to include fewer antenna switches compared to a conventional antenna switching circuit to reduce the cost and footprint of the communication circuit. Furthermore, by reducing the number of antenna switches in the antenna switching circuit, it is possible to improve RF isolation between the first antenna and the second antenna, thus leading to improved RF performance of the communication circuit.
-
Citations
12 Claims
-
1. A communication circuit, comprising:
-
a first radio frequency (RF) signal path configured to transmit a first RF signal during an assigned transmit (TX) period and receive a second RF signal during an assigned receive (RX) period temporally distinct from the assigned TX period; a second RF signal path configured to receive the second RF signal during the assigned RX period; and an antenna switching circuit comprising a first antenna switch, a second antenna switch, and a third antenna switch and configured to; close the first antenna switch, open the second antenna switch, and open the third antenna switch to transmit the first RF signal in a first RF band during the assigned TX period via a first antenna; close the first antenna switch, open the second antenna switch, and open the third antenna switch to transmit the first RF signal in a second RF band during the assigned TX period via the first antenna; open the first antenna switch, close the second antenna switch, and open the third antenna switch to transmit the first RF signal in the first RF band during the assigned TX period via a second antenna; open the first antenna switch, close the second antenna switch, and open the third antenna switch to transmit the first RF signal in the second RF band during the assigned TX period via the second antenna; close the first antenna switch to receive concurrently the second RF signal in the first RF band and the second RF band during the assigned RX period via the first antenna; close the third antenna switch to receive concurrently the second RF signal in the first RF band and the second RF band during the assigned RX period via the second antenna; and decouple the second RF signal path from the second antenna during the assigned RX period in response to the first RF signal path being coupled to the second antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification