Switch Apparatus With Segmented Branch Blocks For Isolation
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Solution Overview
Problem
Conventional switch apparatuses for mobile communication terminals suffer from power leakage and output loss due to insufficient isolation between signal lines, particularly when handling bidirectional signals, which is exacerbated by the increasing demand for high-speed communication functions and higher transmission power in modern mobile devices.
Innovation Solution
A switch apparatus with a first branch switch block and a second branch switch block, where the first block has a smaller number of switching elements than the second, ensuring higher isolation and preventing output intrusion from one line to another, thereby allowing signal output without loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional antenna switch with sufficient isolation is used to prevent power leakage, then isolation between transmitter and receiver sides is improved, but the number of switching elements increases causing output loss
Solution Approach 1:
The switch apparatus is divided into two separate branch switch blocks: a first branch switch block for the transmitter side and a second branch switch block for the receiver side. Each block independently handles switching for its respective side, preventing power leakage between sides without requiring excessive switching elements in a single block. This segmentation allows each block to use fewer elements while maintaining overall isolation.
Solution Approach 2:
Each branch switch block is designed with different characteristics suited to its specific function. The first branch switch block (transmitter side) and second branch switch block (receiver side) have optimized numbers of switching elements according to their respective isolation requirements. This local optimization allows each block to achieve sufficient isolation with minimal elements, reducing total output loss.
2Loss of energy
If the number of switching elements is reduced to minimize output loss, then output efficiency is improved, but isolation between signal lines deteriorates causing power leakage
Solution Approach 1:
Instead of using a single switch block with many elements, the invention segments the switching function into two separate blocks. Each block uses fewer elements, reducing individual output loss, while together they provide the necessary isolation between transmitter and receiver sides by handling each side's switching independently.
3Use of energy by moving object
If DC-DC converter is used to improve power amplifier efficiency, then power supply efficiency is improved, but noise generation and large coil requirements occur
Solution Approach 1:
The invention extracts and removes the DC-DC converter from the power supply system. By eliminating this component, the harmful effects of noise generation and large coil requirements are completely removed, while the power amplifier efficiency is maintained through the optimized switch apparatus design that reduces power loss at the output stage.
Data Source
AI summary
A switch apparatus of the invention comprises a first input terminal, a second input terminal to which a second input signal having a level lower than a level of the first input signal is supplied, a first switch block for outputting the first input signal supplied from the first input terminal through a plurality of switching elements, a second switch block for outputting the second input signal supplied from the second input terminal through a plurality of switching elements; and a control terminal to which a control signal is supplied wherein the control signal controls the first switch block when outputting the first input signal, and controls the second switch block when outputting the second input signal, wherein the first switch block is configured to have a smaller number of switching elements than that of the second switch block.