RF Switching Circuit Using Transmission Amplifiers to Cut Insertion Loss
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Solution Overview
Problem
Current switching circuits used for bidirectional radio frequency signal transmissions introduce additional insertion loss, leading to reduced output power in transmitters and signal-to-noise ratio (SNR) in receivers.
Innovation Solution
The proposed switching circuit employs four transmission amplifiers (BDA1 to BDA4) interconnected in a specific configuration, allowing for different operational modes where amplifiers are selectively turned on or off to amplify and isolate signals, thereby compensating for the circuit's own transmission loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional switching circuit is used for bidirectional RF signal transmission, then the switching function is achieved, but insertion loss increases and signal-to-noise ratio deteriorates
Solution Approach 1:
The switching circuit is segmented into four separate transmission amplifiers (first, second, third, and fourth transmission amplifiers) instead of using a single conventional switching circuit. Each amplifier handles specific signal paths, allowing independent optimization of each path to minimize insertion loss and maintain signal-to-noise ratio.
Solution Approach 2:
The circuit parameters are dynamically changed by selectively activating different transmission amplifiers based on the operating mode. In the first operating mode, the first and second transmission amplifiers are activated with specific gain settings, while in the second operating mode, the third and fourth transmission amplifiers are activated, thereby optimizing performance for different signal transmission directions and minimizing insertion loss.
2Reliability
If transmission amplifiers are added to compensate for switching loss, then signal-to-noise ratio improves, but device complexity increases
Solution Approach 1:
Each transmission amplifier is designed to perform multiple functions: signal amplification, mode switching, and loss compensation. The same four transmission amplifiers serve both as the core switching mechanism and as the amplification mechanism, eliminating the need for separate switching components and reducing overall device complexity while maintaining high signal-to-noise ratio.
Solution Approach 2:
The switching function and amplification function are merged into a single integrated system using the four transmission amplifiers. Instead of having separate switching circuits and amplifiers, the patent combines these functions so that the transmission amplifiers themselves perform the switching by being selectively activated, thereby reducing component count and simplifying the overall circuit architecture.
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 configuration enhances the signal-to-noise ratio by amplifying signals in multiple modes, reducing transmission loss and noise, and maintaining good linearity of power output.
Implementation Method 1
the first transmission amplifier amplifies a first signal and transmits the first signal to the second connection port
Data Source
AI summary
A switching circuit and a method of providing the switching circuit are provided. The switching circuit includes a first transmission amplifier, a second transmission amplifier, a third transmission amplifier, and a fourth transmission amplifier. The first transmission amplifier amplifies a first signal at a first connection port and transmits the first signal to a second connection port in a first mode. The second transmission amplifier amplifies a second signal at a third connection port and transmits the second signal to a fourth connection port in the first mode. The third transmission amplifier amplifies the first signal at the first connection port and transmits the first signal to the fourth connection port in the second mode. The fourth transmission amplifier amplifies the second signal at the third connection port and transmits the second signal to the second connection port in the second mode.