RF System Antenna Sharing for Compact Wearables
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Solution Overview
Problem
Existing RF systems in wearable devices require multiple antennas for transmission and reception, leading to increased size and complexity, which is a challenge for integrating them into compact wearable devices.
Innovation Solution
The RF system incorporates an RF integrated circuit with a control circuit that switches between different modes of operation, allowing the same antennas to function as both transmit and receive antennas using passive coupling structures, reducing the total number of antennas and system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate antennas are used for transmission and reception in RF systems, then the system achieves reliable radar and communication functions, but the device size and structural complexity increase significantly
Solution Approach 1:
The patent implements a dual-functional antenna system where the same antenna structure serves both as transmit antenna and receive antenna. The antenna is coupled to both transmit circuits and receive circuits through switching mechanisms, allowing it to perform multiple functions (transmission and reception) sequentially, thereby eliminating the need for separate dedicated transmit and receive antennas and reducing overall device size.
Solution Approach 2:
The patent merges the transmit antenna and receive antenna into a single shared antenna structure. By combining these previously separate components into one unified antenna system with appropriate switching and isolation mechanisms, the patent reduces the total number of antenna elements required while maintaining both transmit and receive capabilities.
2Reliability
If multiple separate antennas are used for transmission and reception, then the system achieves reliable radar and communication functions, but the system complexity and integration difficulty increase
Solution Approach 1:
The patent implements a dual-functional antenna system where the same antenna structure serves both as transmit antenna and receive antenna. The antenna is coupled to both transmit circuits and receive circuits through switching mechanisms, allowing it to perform multiple functions (transmission and reception) sequentially, thereby eliminating the need for separate dedicated transmit and receive antennas and reducing overall device size.
Solution Approach 2:
The patent merges the transmit antenna and receive antenna into a single shared antenna structure. By combining these previously separate components into one unified antenna system with appropriate switching and isolation mechanisms, the patent reduces the total number of antenna elements required while maintaining both transmit and receive capabilities.
Data Source
AI summary
A radio frequency (RF) system includes an RF integrated circuit (IC) die. The RF IC die includes a first transmit circuit, a second transmit circuit, a first receive circuit, a second receive circuit, and a control circuit coupled to the first transmit circuit, the second transmit circuit, the first receive circuit, and the second receive circuit. The RF system further includes a first antenna coupled to the first transmit circuit and the first receive circuit using a first coupling structure. The control circuit is configured to activate the first transmit circuit and deactivate the first receive circuit during a first operation mode. The RF system further includes a second antenna coupled to the second transmit circuit and the second receive circuit using a second coupling structure. The control circuit is configured to activate the second transmit circuit and deactivate the second receive circuit during a second operation mode.