Controlled Reception Pattern Antenna Low Elevation Gain
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional GNSS-controlled reception pattern antennas face challenges in maintaining anti-jamming performance and antenna gain at low elevation angles, especially when reduced in size for mobile applications, due to increased mutual coupling and distortion from finite ground effects.
Innovation Solution
A controlled reception pattern antenna design featuring a ceramic patch-type radiator with radiating slots on a circular ground platform, where each radiating slot is ¼ of the center wavelength, increases antenna gain at low elevation angles and maintains anti-jamming performance while reducing the antenna's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the array antenna is reduced for mobile vehicle installation, then the antenna size decreases, but mutual coupling increases and antenna gain decreases at low elevation angles
Solution Approach 1:
The ground platform is segmented into multiple regions with radiating slots positioned between adjacent radiators. This segmentation allows each slot to independently contribute to low elevation angle gain while maintaining overall compact antenna structure suitable for mobile vehicles.
Solution Approach 2:
Radiating slots are strategically positioned in specific locations between adjacent radiators on the ground platform. This local modification creates regions of enhanced radiation capability at low elevation angles without requiring overall antenna enlargement, thus maintaining compact size while improving anti-jamming performance.
2Volume of moving object
If the distance between antenna elements is decreased to reduce antenna size, then the antenna size decreases, but mutual coupling increases causing distortion in antenna pattern
Solution Approach 1:
Radiating slots are introduced as intermediary elements between adjacent radiators. These slots act as mediators that manage the electromagnetic interaction between closely-spaced radiators, reducing mutual coupling effects and preventing antenna pattern distortion while allowing compact element spacing for mobile vehicle installation.
3Reliability
If conventional array antenna techniques are used, then anti-jamming capability is achieved, but antenna gain degrades at low elevation angles when size is reduced
Solution Approach 1:
The radiating slots are merged with the ground platform structure, integrating the slot radiation function into the existing antenna architecture. This merging allows the slots to contribute constructively to low elevation angle gain while the overall antenna maintains its anti-jamming capabilities through controlled reception patterns.
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 design enhances antenna gain at low elevation angles, ensuring robust GNSS signal reception across the upper hemisphere with a simple, low-cost structure, and maintains anti-jamming capabilities, addressing the limitations of conventional array antennas.
Implementation Method 1
a radiating slot formed in the ground platform
Data Source
AI summary
Disclosed herein is a controlled reception pattern antenna that prevents the degradation of anti-jamming performance in a compact array antenna by increasing the antenna gain at a low elevation angle. The proposed antenna includes a radiator for receiving a satellite signal, a ground platform in which the radiator is arranged, and a radiating slot formed in the ground platform. By simply forming a radiating slot in the ground platform, antenna gain may be increased at a low elevation angle. Therefore, it is possible to maintain anti-jamming performance and to reduce the size of the array antenna.