Satellite L-Band Antenna Isolation Switching in Compact Electronics
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Solution Overview
Problem
Existing electronic apparatuses with satellite communication capabilities require external antennas, which increase the size of the device and degrade user experience.
Innovation Solution
An electronic apparatus is designed with a first antenna and a second antenna, both capable of operating in the satellite L-band, and an isolation device that switches states between transmission and reception phases to improve isolation and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external four-arm spiral antenna is used to achieve satellite communication, then the circular polarization gain is improved, but the size of the electronic apparatus increases
Solution Approach 1:
The patent merges the transmitting antenna and receiving antenna into a single integrated antenna structure that can operate in both satellite communication modes. This unified antenna design eliminates the need for separate external antennas while maintaining the required circular polarization performance through careful structural design and isolation mechanisms.
Solution Approach 2:
The antenna is designed with multi-functionality to serve both as a transmitting antenna and a receiving antenna for satellite communication. By making the antenna universal, the patent eliminates the need for separate dedicated antennas for each function, thereby reducing the overall device size while maintaining communication reliability.
2Volume of moving object
If a single antenna is used for both transmission and reception in satellite communication, then the device size is reduced, but the isolation between transmission and reception deteriorates
Solution Approach 1:
The patent employs a dynamic isolation mechanism that can switch between different states depending on the operational phase. During transmission, the isolation device is configured to prevent transmit signals from coupling into the receive path, and during reception, it is configured to allow receive signals while blocking transmit signals. This dynamic adjustment maintains effective isolation while using a single antenna structure.
Solution Approach 2:
The patent introduces an isolation device as an intermediary component between the transmitting and receiving functions of the single antenna. This isolation device acts as a mediator that selectively controls signal flow, preventing harmful coupling during transmission while maintaining receive sensitivity, thus solving the isolation problem without requiring separate antennas.
3Reliability
If an external antenna is used, then the antenna performance is improved, but the user experience deteriorates
Solution Approach 1:
The patent merges the antenna functionality directly into the electronic apparatus housing or chassis, eliminating the need for external antennas. This integration maintains antenna performance through careful electromagnetic design while significantly improving user experience by creating a sleek, compact device without protruding external components.
Solution Approach 2:
The patent nests the antenna structure within the electronic apparatus housing, embedding the radiating elements and isolation mechanisms inside the device body. This nesting approach preserves antenna performance characteristics while eliminating the need for external antenna structures, thereby improving aesthetics and user experience.
Data Source
AI summary
An electronic apparatus includes a first antenna; a second antenna; and an isolation device. Each of the first antenna and the second antenna includes a satellite L-band; the isolation device is arranged between the first antenna and the second antenna; and the isolation device is in a first state during a transmission phase of satellite communication and is in a second state during a reception phase of satellite communication or during non-satellite communication.