Composite Bow-Tie and Patch Antenna for TEL GNSS Integration
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Solution Overview
Problem
Conventional broadband antennas for telematics (TEL) and Global Navigation Satellite System (GNSS) face challenges in broadening their frequency band and controlling directional gain, with insufficient improvement in broadband characteristics.
Innovation Solution
A composite antenna device incorporating a broadband bow-tie antenna with a first and second conductor element extending in opposite directions, featuring a patch antenna on one of the conductor elements, ribs, and a coaxial cable system with a magnetic core, allowing for integration of TEL and GNSS functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a broadband antenna for TEL and GNSS are made composite, then miniaturization is achieved, but broadening the band of the TEL antenna and controlling the directional gain become difficult
Solution Approach 1:
The antenna is divided into distinct functional segments: a bow-tie antenna element for broadband TEL coverage and a patch antenna element for GNSS functionality. This segmentation allows each element to be optimized for its specific function while maintaining a compact composite structure, resolving the contradiction between miniaturization and broadband adaptability.
Solution Approach 2:
The patent introduces vertical stacking of antenna elements in the Z-direction, transitioning from a planar to a three-dimensional configuration. The patch antenna is positioned at a specific height above the bow-tie antenna, creating vertical separation that enables independent optimization of each element's radiation pattern and frequency response, thereby achieving both compact size and broadband characteristics.
2Adaptability or versatility
If the band of the TEL antenna is broadened, then frequency coverage is improved, but control over directional gain becomes difficult
Solution Approach 1:
The antenna system segments different frequency bands and directional requirements into separate radiating elements. The bow-tie antenna handles broadband TEL frequencies with omnidirectional characteristics, while the patch antenna provides directional gain control for GNSS signals from specific satellite directions, enabling independent optimization of each function.
Solution Approach 2:
Different regions of the composite antenna structure are designed with locally optimized properties: the bow-tie element uses flared geometry for broadband omnidirectional radiation, while the patch element uses resonant cavity structure for directional gain. This local quality differentiation allows simultaneous achievement of broad frequency coverage and controlled directional characteristics.
3Adaptability or versatility
If a patch antenna is provided on the conductor element, then GNSS functionality is integrated, but structural complexity increases
Solution Approach 1:
The patent merges two separate antenna functions (TEL broadband and GNSS) into a single composite structure where the patch antenna is integrated onto the conductor element of the bow-tie antenna. This merging eliminates the need for separate antenna assemblies, reducing overall system complexity while maintaining dual functionality through shared mechanical support and coordinated radiation 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 solution enables a broadband antenna with improved frequency characteristics and directional gain, suitable for use in vehicles, effectively covering a broad frequency band and enhancing communication capabilities for both TEL and GNSS applications.
Implementation Method 1
a magnetic core which is provided at an outer circumference of the coaxial cables
Data Source
AI summary
The antenna device includes: a broadband antenna based on a bow-tie antenna including a first plate-like metal and a second plate-like metal which extend in opposite directions to each other with respect to a feeding point; and a patch antenna provided on a second portion which is bent substantially at a right angle from a first portion of the first plate-like metal which lies near the feeding point. The second portion performs as a ground plate of the patch antenna. A portion including the patch antenna is accommodated in a radome.