Lossless Antenna Divider Circuit for Reflected Power Suppression
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Solution Overview
Problem
The Wilkinson power divider in antenna devices consumes part of the reflected wave power due to its resistance component, leading to a reduction in overall gain.
Innovation Solution
The antenna device employs a lossless divider circuit with only inductance and capacitance components, and matching circuits with reactance and susceptance elements to adjust the amplitude phase of signals, ensuring no power loss and minimizing reflected wave consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a Wilkinson power divider is used to divide power to multiple antenna elements, then the signal can be distributed to all antenna elements, but the resistance component causes power loss from reflected waves and reduces overall gain
Solution Approach 1:
The patent changes the fundamental parameter of the power divider from resistive (Wilkinson) to reactive (lossless LC circuit). By using only inductance and capacitance components without resistance, the circuit eliminates energy dissipation while maintaining the power division function. This parameter change transforms the divider from an energy-consuming component to an energy-preserving component, solving the contradiction between signal distribution and power loss.
Solution Approach 2:
The patent extracts and removes the resistance component from the power divider circuit. By eliminating the resistive element that causes power loss, the circuit retains only the necessary reactive components (inductors and capacitors) for impedance transformation and power division. This extraction of the harmful resistance component directly addresses the energy loss problem while preserving the essential signal distribution function.
2Power
If a Wilkinson power divider with resistance component is used, then power division is achieved, but the gain of the entire antenna device is lowered due to energy consumption
Solution Approach 1:
The patent changes the circuit parameter from resistive to reactive, eliminating energy loss and thereby preserving antenna gain. The lossless LC circuit maintains voltage and current relationships necessary for power division while avoiding the energy dissipation that degrades gain performance.
Solution Approach 2:
The patent converts the potential harm of reflected waves (which would be lost in resistive circuits) into a beneficial outcome. By using a lossless reactive circuit, reflected waves are not consumed but rather reflected back usefully, maintaining system efficiency and gain while still achieving proper power division among antenna elements.
Data Source
AI summary
An antenna device is configured to include: a divider circuit including an input/output terminal and a plurality of divider terminals; a plurality of matching circuits including one ends connected with the divider terminals; and a plurality of antenna elements connected with other ends of the matching circuits. Furthermore, the matching circuits are lossless circuits each having only an inductance component and a capacitance component, and the divider circuit is a lossless circuit whose characteristic impedance is indicated only by the inductance component and the capacitance component.