Rotationally Symmetric Antenna Feed Layout for Efficient Circular Polarization
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Solution Overview
Problem
In power amplifier circuits connected to antennas for circularly polarized wave emission, the efficiency is degraded due to the need for a synthesis circuit to adjust phases, leading to attenuation and inefficiency.
Innovation Solution
An amplifier module with four power amplifiers and power feed points arranged rotationally symmetrically around the antenna's center, eliminating the need for a phase synthesis circuit by ensuring a 90-degree phase difference between adjacent power feed points, thereby maintaining high efficiency and circularly polarized wave characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a synthesis circuit is used to adjust phases of signals from carrier amplifier and peak amplifier, then circularly polarized wave characteristics are achieved, but efficiency is degraded due to signal attenuation
Solution Approach 1:
The invention extracts and eliminates the synthesis circuit from the system by directly connecting the power amplifiers to the power feed points of the antenna. The phase adjustment function is integrated into the antenna structure itself through the rotational symmetry arrangement, removing the separate synthesis circuit that caused signal attenuation and efficiency degradation.
Solution Approach 2:
The invention merges the phase adjustment function with the antenna structure by arranging power feed points in a rotationally symmetric pattern. The spatial arrangement of feed points inherently provides the phase relationships needed for circular polarization, combining what were previously separate functions (phase adjustment and radiation) into a unified structure.
2Adaptability or versatility
If a synthesis circuit is introduced to combine signals from multiple amplifiers, then circularly polarized wave emission is enabled, but device complexity increases
Solution Approach 1:
The synthesis circuit is extracted and removed from the system. Instead of using a separate circuit to combine and phase-adjust signals, the invention directly connects multiple power amplifiers to the antenna's power feed points, eliminating the intermediate synthesis stage and reducing overall device complexity.
Solution Approach 2:
The power feed points serve multiple functions: they directly receive power from amplifiers and simultaneously establish the phase relationships required for circular polarization through their rotational arrangement. This multi-functionality eliminates the need for dedicated phase adjustment circuits.
3Ease of operation
If multiple power amplifiers are connected to antenna feed points with phase adjustment, then circularly polarized characteristics are achieved, but manufacturing complexity increases
Solution Approach 1:
The invention uses rotational symmetry (a form of controlled asymmetry) in the arrangement of power feed points around the antenna center. This symmetric pattern inherently provides the phase relationships for circular polarization, achieving precise phase control through geometric arrangement rather than complex adjustable circuits, thereby simplifying manufacturing.
Data Source
AI summary
An amplifier module includes an antenna that includes four power feed points, and four power amplifiers. Output ends of the four power amplifiers are connected to the four power feed points in a one-to-one relationship. The four power feed points are arranged rotationally symmetrically around a center of the antenna when a main surface of the antenna is viewed in plan.