Signal Transceiver T/R Switch Segmentation
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving low insertion loss when using a transmitter/receiver switch in Time-Division Duplex mode due to the complex circuit structure and difficulty in efficiently switching between receiving and transmitting modes.
Innovation Solution
A signal transceiver design that includes a signal convert circuit, power amplifiers, capacitive circuits, an impedance convert circuit, and a switch circuit, where the first capacitive circuit and switch circuit are strategically positioned to improve impedance convert efficiency and reduce insertion loss by allowing the impedance convert circuit to be disposed off the chip, thereby reducing chip area and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a circumscribed T/R switch is introduced to switch between receiving and transmitting modes, then the wireless communication system can operate in TDD mode with shared antenna, but the insertion loss increases due to complicated circuit structure
Solution Approach 1:
The patent segments the T/R switch functionality into two separate components: a first switch circuit on the chip for transmitting mode switching, and a second switch circuit off-chip for receiving mode switching. This segmentation allows each switch to be optimized for its specific function, reducing overall insertion loss while maintaining TDD operation capability.
Solution Approach 2:
The patent extracts the receiving mode switch (second switch circuit) from the chip to an external location. This extraction reduces the complexity of the on-chip circuit structure and allows the use of higher-quality external components with lower loss characteristics, thereby reducing insertion loss while preserving TDD functionality.
2Ease of operation
If the T/R switch is connected with the receiver in series, then the switching between receiving and transmitting modes can be achieved, but the circuit structure becomes complicated making low insertion loss difficult to achieve
Solution Approach 1:
The patent divides the switching control into two independent parts: a first switch circuit integrated on the chip for transmitting mode, and a second switch circuit placed externally for receiving mode. This segmentation simplifies the on-chip circuit structure while maintaining full mode switching capability through coordinated operation of both switches.
Solution Approach 2:
By extracting the second switch circuit from the chip to an external location, the patent significantly reduces on-chip circuit complexity. The external switch can be implemented with high-quality components, simplifying the overall system design while maintaining ease of operation for mode switching.
3Ease of manufacture
If the impedance convert circuit is disposed on the chip, then integration is improved, but the insertion loss increases and convert efficiency decreases
Solution Approach 1:
The patent extracts the impedance convert circuit from the chip to an external location. This extraction enables the use of high-quality external impedance conversion components with lower loss characteristics, significantly reducing insertion loss and improving convert efficiency, while the chip itself maintains reasonable integration through the first switch circuit and other essential functions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances impedance convert efficiency, reduces insertion loss, and decreases the occupied chip area, leading to a more cost-effective signal transceiver with improved performance.
Implementation Method 1
a first capacitive circuit, a second capacitive circuit... wherein the first capacitive circuit includes a first capacitor and a second capacitor
Implementation Method 2
a first switch circuit... wherein the first switch circuit includes a first switch and a second switch... control terminals of the first switch and the second switch are coupled with each other
Implementation Method 3
an impedance convert circuit... a second set of terminals of the first capacitive circuit is coupled to a first set of terminals of the impedance convert circuit
Data Source
AI summary
A signal transceiver is provided. The signal transceiver includes: signal convert circuit adapted to convert single-ended signals into differential signals; first power amplifier; receiving amplifier; impedance convert circuit; first capacitive circuit; second capacitive circuit; and first switch circuit; wherein output terminals of the signal convert circuit are connected with output terminals of the first power amplifier and first set of terminals of the first capacitive circuit; second set of terminals of the first capacitive circuit is connected with first set of terminals of the impedance convert circuit; second set of terminals of the impedance convert circuit is connected with input terminals of the receiving amplifier and first set of terminals of the second capacitive circuit; second set of terminals of the second capacitive circuit is connected with first set of terminals of the first switch circuit; and second set of terminals of the first switch circuit is connected to ground.