Radio frequency switch circuit, wireless transceiver system, and electronic device
AssigneeHuawei Technologies Co., Ltd.
InventorsQilin Qiu, Mingming Zhang
Life of this patent
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Abstract
This application discloses a radio frequency switch circuit and an apparatus. An output end of a power amplifier (PA) output matching network is connected to an antenna, and an input end of the PA output matching network is connected to a PA. A low noise amplifier (LNA) input matching network includes a first coupling device, a second coupling device, and a switching device. The first coupling device is connected to the antenna, the switching device and the LNA, the switching device is connected to the second coupling device, and the second coupling device is connected to an LNA. This increases an output power of the PA output matching network and improves work efficiency.
Claims19
A radio frequency switch circuit, comprising:
- a power amplifier (PA) output matching network and a low noise amplifier (LNA) input matching network, wherein
- an output end of the PA output matching network is configured to connect to an antenna, and an input end of the PA output matching network is configured to connect to a PA;
- and
- the LNA input matching network comprises:
- a first coupling device, a second coupling device, and a switching device, wherein
- the first coupling device and the second coupling device are mutually coupled;
- a first end of the first coupling device is configured to connect to the antenna, a second end of the first coupling device is connected to a first end of the switching device and a first end of an LNA, a second end of the switching device is connected to a first end of the second coupling device, a second end of the second coupling device is grounded, and a third end of the second coupling device is connected to a second end of the LNA;
- and
- wherein during signal transmission, the switching device is turned on, so that the first coupling device and the second coupling device are connected in series;
- and during signal reception, the switching device is turned off.
An apparatus comprising a power amplifier (PA) and a low noise amplifier (LNA), a PA output matching network and an LNA input matching network, wherein
- an output end of the PA output matching network is configured to connect to an antenna, and an input end of the PA output matching network is configured to connect to the PA;
- the LNA is connected to the antenna through the LNA input matching network;
- the PA is configured to send a wireless signal to the antenna through the PA output matching network;
- the LNA is configured to receive a wireless signal from the antenna through the LNA input matching network;
- and
- the LNA input matching network comprises:
- a first coupling device, a second coupling device, and a switching device, wherein
- the first coupling device and the second coupling device are mutually coupled;
- a first end of the first coupling device is configured to connect to the antenna, a second end of the first coupling device is connected to a first end of the switching device and a first end of the LNA, a second end of the switching device is connected to a first end of the second coupling device, a second end of the second coupling device is grounded, and a third end of the second coupling device is connected to a second end of the LNA;
- and
- wherein during signal transmission, the switching device is turned on, so that the first coupling device and the second coupling device are connected in series;
- and during signal reception, the switching device is turned off.
Dependencies are inferred from the claim text.