Differential Segmented RF Aperture for Compact Broadband Capture
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Solution Overview
Problem
Existing RF apertures face challenges in achieving a compact, lightweight, and broadband RF capture with minimal reflections and enhanced radar cross section.
Innovation Solution
A differential segmented aperture (DSA) design utilizing electrically conductive tapered projections on an interface printed circuit board (i-PCB) with chip baluns, RF power splitter/combiners, and signal conditioning circuits, integrated with dielectric projections and electronic components on multiple PCBs to facilitate compactness and broadband RF capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional RF aperture designs are used, then RF capture capability is achieved, but the device size and weight are excessive
Solution Approach 1:
The aperture is divided into multiple electrically conductive tapered projections arranged in an array on the i-PCB. Each projection acts as an independent RF capture element, allowing the total RF capture area to be distributed across multiple small elements rather than requiring a single large structure. This segmentation enables compact packaging while maintaining broadband RF capture capability.
Solution Approach 2:
The patent transitions from traditional planar or voluminous RF aperture structures to a vertically integrated design where electrically conductive tapered projections extend perpendicular to the i-PCB surface. This three-dimensional arrangement allows RF capture functionality to be achieved in a compact footprint by utilizing the vertical dimension, reducing overall device size and weight while maintaining effective RF aperture area.
2Adaptability or versatility
If broadband RF capture is achieved, then RF frequency range is improved, but device complexity increases
Solution Approach 1:
The electrically conductive tapered projections serve multiple functions: they act as RF receiving elements, provide broadband impedance matching through their tapered geometry, and function as integrated antenna elements. The chip baluns and RF power splitter/combiners further enable the structure to handle multiple RF frequencies and signal paths simultaneously. This multi-functionality achieves broadband RF capture without proportionally increasing structural complexity.
Solution Approach 2:
The tapered geometry of the electrically conductive projections provides continuous impedance transformation across a broad frequency range. By varying the taper angle and projection dimensions, the structure achieves broadband impedance matching and RF capture capability. The differential segmented aperture configuration also enables frequency-independent performance characteristics, allowing broadband operation without complex tuning mechanisms.
3Ease of operation
If RF power splitter/combiners are integrated, then RF signal distribution is improved, but manufacturing complexity increases
Solution Approach 1:
The RF power splitter/combiner, chip baluns, and electrically conductive tapered projections are integrated into a single assembled unit on the i-PCB. This merging of components simplifies the overall system by eliminating the need for separate RF distribution subsystems. The integrated design allows RF signals to be efficiently distributed to multiple projections while maintaining compact size, and the modular nature of the integration facilitates standardized manufacturing processes.
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
The DSA achieves a compact, lightweight, and broadband RF capture with reduced reflections and enhanced flexibility in RF coupling, enabling phased array beam steering and scalability.
Implementation Method 1
A differential segmented aperture (DSA) design utilizing electrically conductive tapered projections on an interface printed circuit board (i-PCB) with chip baluns, RF power splitter/combiners, and signal conditioning circuits
Implementation Method 2
chip baluns, RF power splitter/combiners, and signal conditioning circuits
Data Source
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AI summary
A radio frequency (RF) aperture includes an interface printed circuit board. An array of electrically conductive tapered projections have bases disposed on a front side of the interface printed circuit board and extend away from the front side of the interface printed circuit board. Chip baluns are mounted on the back side of the interface printed circuit board. Each chip balun has a balanced port electrically connected with two neighboring electrically conductive tapered projections via electrical feedthroughs passing through the interface printed circuit board. Each chip balun further has an unbalanced port, and RF circuitry disposed at the back side of the interface printed circuit board is electrically connected with the unbalanced ports of the chip baluns. The electrically conductive tapered projections include dielectric tapered projections and an electrically conductive layer disposed on an inner or outer surface of the dielectric tapered projections.