Phase Compensating Apparatus for Wireless Transmission VSWR Reduction
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Solution Overview
Problem
Existing wireless signal transmission apparatuses suffer from high voltage standing wave ratio (VSWR) due to insufficient return loss, leading to reduced power transmission efficiency.
Innovation Solution
A phase compensating apparatus is introduced, comprising a main transmission wire and capacitors, with phase compensating units that adjust the output impedance of the power amplifier to match the conjugate complex of the input impedance of the impedance matching apparatus and antenna, thereby reducing VSWR and improving transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power amplifier is coupled directly to the impedance matching apparatus, then the device complexity is reduced, but the return loss is insufficient (between -4 dB to -6 dB) causing high VSWR and reduced transmission efficiency
Solution Approach 1:
A phase compensating apparatus is introduced as an intermediary component between the power amplifier and the impedance matching apparatus. This intermediate device includes phase compensating units that can be selectively connected to adjust the phase of the transmission signal, thereby improving impedance matching and reducing VSWR without significantly increasing overall system complexity
Solution Approach 2:
The phase compensating apparatus employs dynamically selectable phase compensating units that can be connected or disconnected based on operating conditions. This dynamic configuration allows the system to adaptively optimize transmission efficiency across different frequency bands and loading conditions, resolving the contradiction between fixed simple structure and variable performance requirements
2Loss of energy
If the phase compensating unit is selected and connected, then the VSWR is reduced and transmission efficiency is improved, but the device complexity increases due to additional components and configuration options
Solution Approach 1:
The phase compensating apparatus is segmented into multiple discrete phase compensating units, each providing a specific phase adjustment capability. These units can be selectively activated based on the required phase compensation, allowing the system to achieve optimal performance with minimal active components, thus balancing complexity reduction with performance improvement
Solution Approach 2:
The system changes the electrical parameters (phase, impedance) of the transmission path by selectively connecting different phase compensating units. This parameter adjustment capability allows optimization of transmission efficiency without permanently increasing the physical complexity of the device, as the complexity is managed through configurable parameter changes rather than fixed additional components
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
The phase compensating apparatus effectively reduces VSWR and enhances transmission efficiency by adjusting frequency response curves to be lower than a pre-set energy value within a specified frequency band, improving power transmission efficiency.
Implementation Method 1
the phase compensating apparatus adjusts an output impedance of the power amplifier apparatus to substantially equal to a conjugate complex of an input impedance of a combination circuit of the phase compensating apparatus, impedance matching apparatus, and an antenna
Implementation Method 2
A phase compensating apparatus is introduced, comprising a main transmission wire and capacitors, with phase compensating units that adjust the output impedance of the power amplifier to match the conjugate complex of the input impedance of the impedance matching apparatus and antenna
Implementation Method 3
A first end of each of the capacitors is coupled to the main transmission wire. The phase compensating unit has two ends for being coupled to second ends of two of the capacitors
Data Source
AI summary
The invention provides a wireless transmission apparatus, a phase compensating apparatus, and a phase compensating method thereof. The phase compensating apparatus includes main transmission wire, a plurality of capacitors, and at least one phase compensating unit. The main transmission wire is coupled between the output end of the power amplifier and the input end of the impedance matching apparatus. A first end of each of the capacitors is coupled to the main transmission wire. The phase compensating unit has two ends for being coupled to second ends of two of the capacitors.