High-Frequency Module Switch Layout for Carrier Aggregation Paths
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Solution Overview
Problem
Conventional high-frequency modules experience degradation in filter characteristics and signal loss when applied to carrier aggregation due to long signal paths and wiring distances between antenna terminals and switches.
Innovation Solution
A high-frequency module design featuring a mounting substrate with strategically positioned antenna switches and filters, where the distance between the antenna terminal and the first antenna switch is shorter than to the second antenna switch, and the distance between the first antenna switch and the first filter is longer than between the second antenna switch and the second filter, allowing for simultaneous connection and reduced wiring lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the common terminal of the antenna switch is arranged close to the antenna terminal to reduce signal loss in wiring, then signal loss is suppressed, but the signal path length to filters increases causing filter characteristic degradation
Solution Approach 1:
The antenna switch is divided into two separate components: a first antenna switch connected to the antenna terminal and a second antenna switch connected to the filters. This segmentation allows the first switch to be positioned close to the antenna terminal for low signal loss, while the second switch can be positioned close to the filters for maintaining filter characteristics, thus resolving the spatial contradiction.
Solution Approach 2:
The first antenna switch acts as an intermediary component between the antenna terminal and the second antenna switch. It receives signals from the antenna terminal and transfers them to the second antenna switch, which then connects to the filters. This intermediary structure enables optimal positioning for both signal loss reduction and filter characteristic maintenance.
2Adaptability or versatility
If the signal path is made long to connect all filters through a single antenna switch, then filter connectivity is achieved, but filter characteristics are degraded due to the long path
Solution Approach 1:
The single antenna switch architecture is segmented into two switches: the first antenna switch for receiving signals from the antenna terminal, and the second antenna switch for distributing signals to multiple filters. This segmentation shortens the effective signal path to each filter while maintaining connectivity to all filters, thus preserving filter characteristics.
Solution Approach 2:
The patent transitions from a single-dimensional signal path (antenna terminal → single switch → filters) to a two-dimensional switch network architecture. The first antenna switch connects to the antenna terminal, and the second antenna switch connects to multiple filters, creating a distributed path that reduces individual path lengths while maintaining system connectivity.
3Device complexity
If a single antenna switch is used to connect all filters, then device complexity is reduced, but signal loss and filter characteristic degradation occur
Solution Approach 1:
The antenna switch function is segmented into two separate switches positioned at different locations in the signal path. The first antenna switch is positioned close to the antenna terminal to minimize signal loss in the receiving path, while the second antenna switch is positioned close to the filters. Although this increases component count, it significantly reduces signal loss and maintains filter characteristics, achieving better overall performance.
Data Source
AI summary
A high-frequency module includes a mounting substrate, a first antenna switch, a second antenna switch, a filter (303), and a filter (307). The filter (303) and the filter (307) are respectively connected with an output terminal (204) and an output terminal (208). The second antenna switch is configured to be able to simultaneously execute connection between an input terminal and the output terminal (204) and connection between the input terminal and the output terminal (208). In plan view of the mounting substrate, a distance between an antenna terminal and the first antenna switch is shorter than a distance between the antenna terminal and the second antenna switch. A distance between the first antenna switch and the filter (303) is longer than a distance between the second antenna switch and the filter (303).