Nested Omnidirectional and Directional Antenna for Signal Isolation
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Solution Overview
Problem
Existing antenna systems face challenges with electrical interference and physical obstructions when multiple antennas are co-located, leading to degraded signal quality and increased space requirements.
Innovation Solution
The design incorporates an omnidirectional antenna with a conical section and a directional antenna within its interior, featuring electrically unobstructed feed apertures and cables to minimize interference, allowing for simultaneous operation of multiple antennas without physical or electrical impediments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple antennas are mounted in close proximity, then space usage is optimized, but electrical interference between antennas increases
Solution Approach 1:
The patent places a directional antenna inside the omnidirectional antenna structure, with the directional antenna positioned within the interior portion of the omnidirectional antenna. This nesting arrangement allows multiple antennas to occupy the same spatial envelope without physical collision, optimizing space usage while maintaining electrical isolation through careful positioning and feed cable routing.
Solution Approach 2:
The patent extracts the feed cables from external routing and positions them internally within the omnidirectional antenna structure. The feed cables are routed through the interior portion and exit through designated feed apertures, preventing external cable interference and reducing electrical coupling between antennas while maintaining compact dimensions.
2Ease of manufacture
If feed cables are positioned externally for multiple antennas, then installation is simplified, but physical obstructions and electrical shorts increase
Solution Approach 1:
The feed cables are extracted from external routing and repositioned within the interior portion of the omnidirectional antenna. The cables traverse internally from the directional antenna through the structure and exit through dedicated feed apertures, eliminating external cable obstructions and preventing electrical shorts between multiple antenna systems.
Solution Approach 2:
The omnidirectional antenna structure itself serves as an intermediary medium that houses and protects the feed cables. The interior portion and wall structure provide a controlled environment for cable routing, with feed apertures serving as designated exit points that maintain electrical isolation while enabling cable access.
3Volume of moving object
If antennas are placed in close electrical proximity, then space is saved, but radiation pattern and impedance match degrade
Solution Approach 1:
The directional antenna is nested within the omnidirectional antenna structure, with both antennas operating in close proximity without degrading performance. The nested configuration maintains proper radiation patterns and impedance matches by positioning the directional antenna in the interior portion and providing adequate electrical separation through the structure's geometry and feed cable routing.
Data Source
AI summary
An antenna is disclosed, including an omnidirectional antenna with a first conical antenna section. The omnidirectional antenna forms a first feed aperture. The omnidirectional antenna forms a field of view aperture in a wall of the omnidirectional antenna. The antenna also includes a directional antenna, disposed within an interior portion of the omnidirectional antenna such that the directional antenna has an electrically unobstructed field of view through the field of view aperture in the wall of the omnidirectional antenna. The antenna also includes a feed cable, electrically coupled to the directional antenna and disposed within the omnidirectional antenna and the first feed aperture.