Transformer-Coupled RF Transceiver for Impedance Matching
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Solution Overview
Problem
Existing radio communication transceivers with dual-end transmitting amplifiers increase energy and cost consumption due to the need for additional amplifiers for impedance matching, which is inefficient and costly.
Innovation Solution
A radio communication transceiver design utilizing a single transformer with a center-tap secondary winding, a power amplifier, a low noise amplifier, and a switch, where the switch's ON and OFF states manage impedance matching without additional elements, allowing for single-end transmitting and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual-end transmitting amplifiers are used for impedance matching, then impedance matching is achieved, but energy consumption increases
Solution Approach 1:
The patent extracts the impedance matching function from the amplifier circuit by introducing a separate transformer-based matching network. The transformer with center-tap secondary winding and switching circuitry handles impedance transformation independently, allowing the amplifier to operate in a simpler single-end transmitting mode with reduced energy consumption while maintaining effective impedance matching.
Solution Approach 2:
The patent introduces a transformer as an intermediary component between the amplifier and the antenna. This transformer with center-tap secondary winding and associated switching circuit acts as a mediator that performs impedance transformation without requiring the amplifier to operate in dual-end mode, thereby reducing energy consumption while achieving proper impedance matching.
2Reliability
If dual-end transmitting amplifiers are used for impedance matching, then impedance matching is achieved, but cost consumption increases
Solution Approach 1:
The patent extracts the impedance matching function from the amplifier circuit by introducing a separate transformer-based matching network. This separation allows the use of simpler, lower-cost amplifier designs while maintaining effective impedance matching through the transformer and switching circuitry.
Solution Approach 2:
The transformer with center-tap secondary winding serves multiple functions: it provides impedance transformation, enables single-end transmitting operation, and works with the switching circuit to achieve proper matching for both transmitting and receiving modes. This multi-functionality reduces the need for additional specialized components, thereby lowering overall system cost.
3Reliability
If additional elements are added for impedance matching, then impedance matching is achieved, but device complexity increases
Solution Approach 1:
The patent merges the impedance matching function with the existing transformer structure by utilizing the center-tap secondary winding and integrating the switching circuitry into the transformer assembly. This consolidation achieves effective impedance matching without adding numerous separate components, thereby limiting the increase in device complexity.
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
This design achieves impedance matching while reducing energy and cost by using a single transformer and switch, enabling efficient signal transmission and reception without additional components, thereby decreasing overall energy and cost consumption.
Implementation Method 1
The transformer has a primary winding and a center-tap secondary winding
Implementation Method 2
the drain is connected to the second endpoint of the primary winding of the transformer through a coupling capacitor
Data Source
AI summary
A radio communication transceiver includes a transformer, a switch, a power amplifier (AP), and a low noise amplifier (LNA). The transformer has a primary winding and a center-tap secondary winding, the primary winding has a first endpoint and a second endpoint, and the center-tap secondary winding has a first endpoint, a second endpoint, and a third endpoint. The switch has a gate, a drain, and a source, in which the gate receives a control signal (CS), the drain is connected to the second endpoint of the primary winding of the transformer through a coupling capacitor, and the source is grounded. The PA has at least one output terminal connected to the first endpoint and the second endpoint of the center-tap secondary winding of the transformer. The LNA has an input terminal connected to the second endpoint of the primary winding of the transformer.