Ring-Shaped Antenna Cell for Sub-THz Phase Switching
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Solution Overview
Problem
Existing transmitarray or reflectarray antennas face challenges with high power consumption, production costs, limited bandwidth, and phase quantization, especially when operating at sub-THz frequencies.
Innovation Solution
An array antenna cell design comprising a semiconductor substrate with a first and second polarizer and a ring-shaped radiating element, coupled by switches, allowing switching between phase states in transmission and reflection modes, enabling two phase states in transmission and four phase states in reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If phased array antennas are used, then precise beam orientation control and wide angular range are achieved, but power consumption and production costs become too high for consumer devices
Solution Approach 1:
The patent replaces the active electronic control system of phased array antennas with a passive optical system using polarizers and radiating elements. The beam steering is achieved through geometric arrangement and polarization control rather than active phase shifting, eliminating the need for complex feed networks and high-power amplifiers at each element.
Solution Approach 2:
The patent changes the operating parameters by using polarization states instead of phase shifts for beam control. The radiating elements are configured to transmit or reflect electromagnetic waves with specific polarization orientations, allowing beam direction control through polarization manipulation rather than phase modulation.
2Volume of moving object
If reconfigurable metasurfaces based on liquid crystals are used, then compactness is improved, but excessive losses and relatively small bandwidth occur
Solution Approach 1:
The patent uses radiating elements that can transition between different operational states (transmission and reflection modes) with distinct phase characteristics. The phase transition mechanism enables compact design while maintaining low losses by utilizing the inherent resonant properties of the radiating elements rather than relying on liquid crystal phase changes.
3Device complexity
If transmitarray or reflectarray antennas are used, then simpler structure is achieved, but versatility is reduced and performance is limited at high frequencies
Solution Approach 1:
The patent creates a universal antenna cell structure that can operate in multiple modes (transmission and reflection) and at different frequencies. The radiating element configuration with polarizers enables the same basic structure to function across a wide frequency range, including sub-THz frequencies, by adjusting the polarization states and element geometry rather than requiring frequency-specific designs.
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 design achieves high gain, improved energy efficiency, and reduced complexity with enhanced phase quantization, suitable for sub-THz frequencies, while maintaining a wide bandwidth and low insertion losses.
Implementation Method 1
a first polarizer located on a first side of the semiconductor substrate; a second polarizer located on a second side of the semiconductor substrate
Implementation Method 2
said at least one radiating element being adapted to switching between phase states in transmission mode and phase states in reflection mode
Data Source
AI summary
Array antenna cell comprising a semiconductor substrate; a first polarizer located on a first side of the semiconductor substrate; a second polarizer located on a second side of the semiconductor substrate, opposite to the first side; and at least one radiating element interposed between the semiconductor substrate and the second polarizer, said at least one radiating element being generally ring-shaped.