Bypass path loss reduction

Patent metadata

Field	Value
Publication number	US-10447323-B2
Application number	US-201715809231-A
Country	US
Kind code	B2
Filing date	Nov 10, 2017
Priority date	Apr 30, 2014
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

Aspects of this disclosure relate to reducing insertion loss associated with a bypass path. In an embodiment, an apparatus includes a first switch having at least two throws, a second switch having at least two throws, a bypass path between the first switch and the second switch, and at least one inductor. The at least one inductor is configured to compensate for capacitance associated with the bypass path to cause insertion loss of the bypass path to be reduced.

First claim

What is claimed is:

1. A diversity module with bypass path loss reduction, the diversity module comprising:
an antenna port configured to receive a radio frequency signal;
switches including a first multi-throw switch coupled to the antenna port and a second multi-throw switch, the first multi-throw switch being configurable into at least a first state and a second state;
a receive path between the first multi-throw switch with the multi-throw second switch, the receive path including a low noise amplifier, and the first multi-throw switch configured to electrically connect the antenna port to the receive path in the second state and to electrically isolate the bypass path from the antenna port in the second state; and
a bypass path between the first multi-throw switch and the second multi-throw switch, the bypass path including an inductor coupled in series between the first multi-throw switch and the second multi-throw switch, the inductor configured to cause insertion loss of the bypass path to be reduced, the bypass path arranged to bypass the receive path, and the first multi-throw switch configured to electrically connect the antenna port to the bypass path in the first state and to electrically isolate the receive path from the antenna port in the first state.

2. The diversity module of claim 1 further comprising a second inductor configured to compensate for an off state capacitance of the first multi-throw switch.

3. The diversity module of claim 2 wherein the first multi-throw switch is coupled between the second inductor and the bypass path.

4. The diversity module of claim 2 wherein the second inductor has an adjustable inductance.

5. The diversity module of claim 2 wherein the second inductor is a shunt inductor.

6. The diversity module of claim 2 further comprising a third inductor configured to compensate for an off state capacitance of the second multi-throw switch.

7. The diversity module of claim 1 wherein the first multi-throw switch includes four throws.

8. The diversity module of claim 7 wherein the second multi-throw switch includes four throws.

9. The diversity module of claim 1 further comprising a second receive path between the first multi-throw switch with the multi-throw second switch, the second receive path including a second low noise amplifier.

10. The diversity module of claim 9 wherein the first receive path includes a first band pass filter, the second receive path includes a second band pass filter, and the first band pass filter and the second band pass filter are arranged to pass different frequency bands.

11. A wireless communication device with bypass path loss reduction, the wireless communication device comprising:
a primary antenna;
a diversity antenna; and
a diversity module configured to receive a radio frequency signal from the diversity antenna, the diversity module including a bypass path and a receive path, the bypass path including an inductor coupled in series between multi-throw switches and configured to cause insertion loss of the bypass path to be reduced, the receive path including a low noise amplifier coupled between the multi-throw switches, the bypass path arranged to bypass the receive path, and a first switch of the multi-throw switches configured to (a) electrically connect the diversity antenna to the bypass path and electrically isolate the receive path from the diversity antenna in a first state and (b) electrically connect the diversity antenna to the receive path and electrically isolate the bypass path from the diversity antenna in a second state.

12. The wireless communication device of claim 11 further comprising an antenna switch module in communication with the diversity antenna by way of the diversity module.

13. The wireless communication device of claim 12 wherein the antenna switch module is in communication with the primary antenna.

14. The wireless communication device of claim 11 wherein the diversity module includes a second inductor configured to compensate for an off state capacitance associated with a multi-throw switch of the multi-throw switches.

15. The wireless communication device of claim 11 wherein the diversity module includes a second receive path associated with a different frequency band than the receive path.

16. A method of reducing bypass path insertion loss, the method comprising:
receiving a radio frequency signal at an input of a diversity module;
operating the diversity module in a bypass mode in which the input of the diversity module is coupled to an output of the diversity module by way of a bypass path that electrically connects a first multi-throw switch with a second multi-throw switch, the bypass path arranged to bypass a receive path of the diversity module; and
compensating for an off state capacitance of the first multi-throw switch in the bypass mode to cause insertion loss associated with the bypass path to be reduced, the off state capacitance of the first multi-throw switch being associated with electrically isolating the receive path of the diversity module from the input of the diversity module in the bypass mode.

17. The method of claim 16 further comprising compensating for a capacitance of a transmission line of the bypass path with a series inductor.

18. The method of claim 16 wherein the off state capacitance of the first multi-throw switch includes an off state series capacitance associated with a throw of the first multi-throw switch that is unconnected to the bypass path.

19. The method of claim 16 further comprising compensating for an off state capacitance of the second multi-throw switch in the bypass mode.

20. The method of claim 16 wherein the receiving includes receiving the radio frequency signal from a diversity antenna of a mobile phone.

Assignees

• Skyworks Solutions Inc

Inventors

• Lee Junhyung
• Agarwal Bipul
• Lee Yong Hee
• Heo Junwon

Classifications

• H04B1/18 Primary

  Input circuits, e.g. for coupling to an antenna or a transmission line (coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H) · CPC title

• H04B1/44

  Transmit/receive switching · CPC title

• H04B7/04

  using two or more spaced independent antennas · CPC title