Cross Bow-Tie Antenna Radiator With Octagonal Beam-Shaping Reflector
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Solution Overview
Problem
Bow-tie antennas exhibit significant beam width deviation between the element direction and vertical direction, leading to inefficient space utilization and performance issues in antenna devices.
Innovation Solution
An antenna radiating element comprising two bow-tie antennas arranged in a cross shape with a reflector having a regular octagonal cross-sectional shape, which includes a tubular portion with an opening and a bottom portion, positioned to suppress beam width deviation by optimizing the arrangement and reflection of electromagnetic waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two bow-tie antennas are arranged in a cross shape, then space utilization is improved, but beam width deviation between element direction and vertical direction increases
Solution Approach 1:
The patent applies asymmetry by introducing a reflector with a specific asymmetric configuration (tubular portion with opening and bottom portion) to compensate for the symmetric cross-shaped antenna arrangement. This asymmetric reflector structure creates differential reflection effects that balance the beam widths in different directions, resolving the beam width deviation problem while maintaining the space-saving cross configuration
Solution Approach 2:
The reflector serves as an intermediary element between the cross-shaped antenna elements and the surrounding space. By positioning the reflector (with its tubular portion and bottom portion) strategically, it mediates the electromagnetic wave propagation to equalize beam widths in the element direction and vertical direction, enabling both compact arrangement and uniform radiation pattern
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 solution effectively reduces beam width deviation, enabling denser arraying of antenna elements, downsizing the device, and enhancing performance by using a regular octagonal reflector shape that opposes sides of adjacent elements, facilitating orderly arrangement and improved beam suppression.
Implementation Method 1
a reflector including a tubular portion having a cross-sectional shape, which is a regular octagon, in a cross-section orthogonal to an axial direction
Data Source
AI summary
An antenna radiating element includes an antenna portion and a reflector. The antenna portion includes two bow-tie antennas arranged in a cross shape. The reflector includes a tubular portion having a cross-sectional shape, which is a regular octagon, in a cross-section orthogonal to an axial direction, a bottom portion closing one end part in the axial direction of the tubular portion, and an opening portion provided at an end part opposite to the one end part of the tubular portion. The antenna portion is positioned in the vicinity of the opening portion.