High Frequency Module Switchable Inductor Signal Leakage
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Solution Overview
Problem
Existing high frequency modules struggle to achieve desired characteristics across multiple communication bands, leading to increased loss of reception signals and leakage of transmission signals.
Innovation Solution
A high frequency module incorporating a low noise amplifier, a switch, first and second inductors, and first and second filters, allowing the switch to switch between different states to optimize signal reception and transmission across various communication bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed inductor configuration is used in the high frequency module, then the circuit structure is simple, but the reception signal loss increases and transmission signal leakage occurs in certain communication bands
Solution Approach 1:
The patent applies the dynamics principle by replacing the fixed inductor configuration with a switchable configuration. The switch can dynamically change the connection state of the inductor between the reception path and ground based on the communication band being used. This dynamic adjustment allows the circuit to adapt to different frequency requirements, reducing signal loss and leakage while maintaining simplicity through a single switch component rather than multiple fixed inductors.
2Device complexity
If the inductor is always connected to the reception path, then the circuit is simple, but transmission signal leakage increases
Solution Approach 1:
The patent uses the dynamics principle to implement a switchable connection configuration. The switch dynamically connects the inductor to either the reception path or ground based on operational requirements. During transmission operations, the switch connects the inductor to ground to prevent transmission signal leakage, while during reception operations, it connects to the reception path to maintain signal integrity. This dynamic switching eliminates the need for complex multi-inductor configurations while effectively preventing signal leakage.
3Object-generated harmful factors
If the inductor is always connected to ground, then transmission signal leakage is reduced, but reception signal loss increases
Solution Approach 1:
The patent applies the dynamics principle by implementing a switchable connection state for the inductor. The switch dynamically changes the connection between the inductor and either the reception path or ground based on whether the module is in transmission or reception mode. During reception, the switch connects the inductor to the reception path to minimize signal loss, while during transmission, it connects to ground to prevent leakage. This dynamic reconfiguration resolves the contradiction between leakage prevention and signal integrity.
4Reliability
If a switchable inductor configuration is implemented, then signal loss and leakage are reduced, but the device complexity increases
Solution Approach 1:
The patent applies the dynamics principle using a single switch component that can change the inductor's connection state between reception path and ground. This dynamic switching capability improves signal quality by reducing loss and leakage without requiring multiple fixed inductors or complex circuit configurations. The switch provides the necessary flexibility to adapt to different communication bands while maintaining relatively simple circuit architecture.
Solution Approach 2:
The patent uses the parameter changes principle by altering the connection state parameter of the inductor through the switch. By changing the electrical connection parameter (connected to reception path or ground) based on operational mode, the system optimizes signal characteristics for different communication bands. This parameter switching approach improves signal quality while adding minimal complexity compared to redesigning the entire inductor configuration.
Data Source
AI summary
A high frequency module includes a low noise amplifier, a switch, a first inductor, a second inductor, a first filter, and a second filter. The first inductor is connected between the low noise amplifier and an output terminal of the switch. The second inductor is connected between a path between the first inductor and the output terminal of the switch, and an input/output terminal of the switch. The switch is configured to switch between a first state where a first input terminal connected to the first filter and the output terminal are connected, and the input/output terminal and a ground terminal are connected, and a second state where a second input terminal connected to the second filter and the input/output terminal are connected.