Remote Switch Layout for Beam-Steering Multi-Mode Antennas
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Solution Overview
Problem
Existing multi-mode antennas for beam steering require switches to be positioned at the parasitic element, which is not feasible in single chip solutions or when space is limited, leading to challenges in integrating them into host communication systems.
Innovation Solution
Positioning the switch and tunable control circuit remotely from the antenna structure, integrating it into a front-end module (FEM) and using transmission lines or control lines to compensate for electrical delay and impedance, allowing for integration into host communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If switches are positioned at the parasitic element for beam steering, then beam steering capability is achieved, but device complexity and space requirements increase
Solution Approach 1:
The switch is extracted from the parasitic element location and repositioned to a remote location within the FEM. This extraction eliminates the complexity of positioning switches at each parasitic element while maintaining beam steering functionality through transmission line connections.
Solution Approach 2:
The FEM is designed to serve multiple functions: it houses the switch, contains the transmission line connections, and provides beam steering control for multiple antennas. This multi-functionality reduces overall system complexity by consolidating control elements.
2Adaptability or versatility
If switches are positioned at the parasitic element, then antenna control is achieved, but integration into host communication systems becomes difficult
Solution Approach 1:
The switch and control circuitry are extracted from the antenna structure and relocated to the FEM. This extraction simplifies integration into host communication systems by consolidating control elements in a standardized location that is easier to manufacture and assemble.
Solution Approach 2:
Transmission lines serve as intermediaries connecting the remotely positioned switch in the FEM to the parasitic elements. This intermediary approach enables antenna control functionality while maintaining ease of integration by separating control functions from radiating structures.
3Volume of moving object
If space is limited in the antenna structure, then compact design is achieved, but switch positioning becomes infeasible
Solution Approach 1:
The switch is extracted from the compact antenna structure and relocated to the FEM where space is available. This extraction resolves the space constraint by positioning the switch in a location with sufficient volume while maintaining electrical connection through transmission lines.
Solution Approach 2:
The switch positioning problem is solved by transitioning from a two-dimensional antenna plane to a three-dimensional system that includes the FEM location. This dimensional change allows the switch to be positioned remotely while maintaining functional connectivity.
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
Enables integration of multi-mode antennas into systems with limited space, reducing component count and costs while maintaining optimal radiation patterns and frequency responses.
Implementation Method 1
a first parasitic element positioned outside of the antenna volume and adjacent to the first antenna radiating element, wherein said first parasitic element is configured to provide a first electromagnetic coupling between the first antenna radiating element and the first parasitic element
Implementation Method 2
a first transmission line having a first end and a second end, the first end of the first transmission line being coupled to the first parasitic element, and the second end of the first transmission line being coupled to a port associated with the first active tuning component or circuit
Data Source
AI summary
A technique is described where the switch and/or tunable control circuit for use with an active multi-mode antenna is positioned remote from the antenna structure itself for integration into host communication systems. Electrical delay and impedance characteristics are compensated for in the design and configuration of transmission lines or parasitic elements as the active multi-mode antenna structure is positioned in optimal locations such that significant electrical delay is introduced between the RF front-end circuit and multi-mode antenna. This technique can be implemented in designs where it is convenient to locate switches in a front-end module (FEM) and the FEM is located in vicinity to the transceiver.