Cross-Shaped Patch Antenna for Millimeter Wave Polarization Diversity
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Solution Overview
Problem
Existing wireless communications circuitry in electronic devices faces challenges in supporting high-frequency communications beyond 10 GHz, particularly in millimeter wave and centimeter wave bands, due to signal attenuation and line-of-sight requirements.
Innovation Solution
The implementation of a wireless communications circuitry with a cross-shaped patch antenna resonating element and switching circuitry that allows for high efficiency mode and polarization diversity, using conductive landing pads and vertical legs on a stacked dielectric substrate, enabling efficient transmission and reception of signals between 10 GHz and 300 GHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If millimeter wave communications are used to support high bandwidths, then communication capacity is improved, but signal attenuation increases substantially during propagation
Solution Approach 1:
The patent transitions from conventional lower-frequency wireless communications to millimeter wave frequencies (10-300 GHz), operating in a different dimension of the electromagnetic spectrum. This enables high bandwidth communications while managing the inherent challenges of signal attenuation through specialized antenna designs and beamforming techniques that concentrate energy in specific directions.
2Productivity
If millimeter wave communications are implemented, then high bandwidth support is achieved, but line-of-sight requirements become more stringent
Solution Approach 1:
The patent employs beamforming and phased array techniques that dynamically adjust the direction and focus of millimeter wave signals. By electronically steering beams and adapting transmission patterns in real-time, the system can overcome obstacles and maintain connections even when perfect line-of-sight is not available, making the communication more adaptable to varying environmental conditions.
3Adaptability or versatility
If a cross-shaped patch antenna resonating element is used, then polarization diversity is improved, but device complexity increases due to multiple feeds and switching circuitry
Solution Approach 1:
The cross-shaped patch antenna design integrates multiple feeds (first and second feeds) that can excite different polarization modes from a single resonating structure. The switching circuitry enables the antenna to function in multiple modes: high efficiency mode using one feed and polarization diversity mode using both feeds, allowing the same physical structure to serve multiple communication purposes.
Solution Approach 2:
The patent incorporates switching circuitry and control logic that pre-configures the antenna feeds based on detected operating conditions. When polarization diversity is needed, the control circuitry proactively activates both feeds; when high efficiency is prioritized, it switches to single-feed operation. This preliminary configuration optimizes performance before communication demands arise.
4Reliability
If conductive landing pads and vertical legs are added to the antenna structure, then signal transmission efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The antenna structure employs a nested configuration where conductive landing pads are positioned beneath the cross-shaped patch, and vertical legs extend downward from the patch arms to connect the landing pads to the ground plane. This nested arrangement integrates multiple functional elements (radiating patch, feeding pads, grounding structure) in a compact vertical hierarchy, improving signal transmission while containing the increased manufacturing complexity within a structured framework.
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
This configuration enhances signal reception and transmission capabilities across a wide frequency range, providing improved polarization diversity and antenna efficiency, even in the presence of blocking objects, by dynamically adjusting the active antenna feeds based on operating requirements.
Implementation Method 1
The antenna resonating element may include a cross-shaped patch having first and second arms extending along a first longitudinal axis and third and fourth arms extending along a second longitudinal axis perpendicular to the first longitudinal axis
Data Source
AI summary
An electronic device may be provided with an antenna and transceiver circuitry such as millimeter wave transceiver circuitry. The antenna may include an antenna ground and a resonating element. The resonating element may include a cross-shaped patch having arms extending along different longitudinal axes, conductive landing pads interposed between the cross-shaped patch and the antenna ground, and vertical conductive legs extending between each of the arms and corresponding landing pads. The antenna may be fed using a first antenna feed coupled between a first of the landing pads and the antenna ground and a second antenna feed coupled between a second of the landing pads and the antenna ground. The landing pads, antenna ground, and cross-shaped patch may be formed from conductive traces on different layers of a dielectric substrate.