Multi-band Antenna Switching for GPS Signal Retention
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Solution Overview
Problem
Existing multi-band antennas fail to retain specific frequency bands, such as the GPS signal band, before and after switching due to limitations in antenna mounting space and switching structures, leading to disruptions in signal operation.
Innovation Solution
A multi-band antenna design featuring a radiator with multiple patterns and a switching unit that connects feeding units to maintain frequency bands without modification, ensuring continuous operation across different frequency bands by adjusting contact points and radiator patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switch structure is added to change antenna forms for different frequency bands, then the antenna can operate at various frequency bands, but the signal of a specific frequency band cannot be retained before and after switching
Solution Approach 1:
The antenna system is segmented into multiple radiator patterns (first, second, third patterns) that can be independently activated. Each radiator pattern is designed to operate at specific frequency bands, allowing the system to segment the frequency spectrum coverage across different physical structures. This enables seamless transition between frequency bands while maintaining continuous coverage through overlapping operational bands of different patterns.
Solution Approach 2:
The antenna system achieves multi-functionality by enabling a single antenna structure to perform multiple functions: it can operate at first, second, and third frequency bands simultaneously or sequentially by activating different radiator patterns. The feeding unit switching mechanism allows the same physical antenna to serve different communication purposes (GPS, cellular, Wi-Fi) without requiring separate dedicated antennas for each function.
2Adaptability or versatility
If the number of antennas is increased to cover more frequency bands, then frequency coverage is improved, but the antenna mounting space becomes insufficient
Solution Approach 1:
The antenna system employs dynamic reconfiguration capability where the radiator patterns can be dynamically switched between different operational states. The feeding units can be dynamically connected to different radiator patterns based on the required frequency band, allowing the antenna to adapt its electrical length and resonant frequency without physical movement or mechanical adjustment. This dynamic switching enables multi-band operation from a single static physical structure.
Solution Approach 2:
The antenna system changes its electrical parameters (resonant frequency, electrical length, impedance) by switching between different radiator patterns and feeding unit configurations. By altering which radiators are active and how they are fed, the system can tune its operational characteristics to match different frequency bands without changing its physical dimensions or requiring multiple separate antenna elements.
Data Source
AI summary
A multi-band antenna is provided. The multi-band antenna includes a plurality of radiator patterns that are configured to operate according to different frequency bands, a plurality of feeding units that are respectively connected to different contact points of the antenna radiator for connecting feeding units of the plurality of feeding units to at least one radiator pattern included in the plurality of radiator patterns, and a switching unit configured to switch between feeding units of the plurality of feeding units for connecting at least one radiator pattern included in the plurality of radiator patterns to the switched feeding unit.