Dual-Band Phased Array Layout for Compact Tx/Rx Beam Tilting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing satellite communication antennas require separate substrates for transmission and reception, leading to increased size and suboptimal polarization and beam tilt characteristics due to individual configuration of transmission and reception antenna elements.
Innovation Solution
A dual-band dual-polarization active phased array antenna with transmission and reception antenna elements alternatively arranged in a matrix on a single substrate, enabling power feeding through a transmission and reception circuit unit, which divides the antenna array into domains to minimize size and improve polarization and beam tilt characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission antenna and reception antenna are configured as individual substrates, then transmission and reception functions are achieved, but overall antenna volume and size are increased
Solution Approach 1:
The patent merges transmission antenna elements and reception antenna elements onto a single substrate, forming an integrated antenna array. This consolidation eliminates the need for separate transmission and reception substrates, directly reducing the overall antenna volume while maintaining both transmission and reception functions through shared structural support and electromagnetic environment.
Solution Approach 2:
The single substrate serves multiple functions: it supports both transmission antenna elements and reception antenna elements, provides a common ground plane for both functions, and enables dual-band operation. This multi-functionality approach allows the antenna system to achieve both transmission and reception capabilities without requiring separate dedicated substrates for each function.
2Volume of moving object
If transmission antenna and reception antenna are disposed on one substrate, then antenna size is reduced, but polarization characteristics and beam tilt characteristics are degraded due to interference
Solution Approach 1:
The antenna array is segmented into distinct transmission regions and reception regions on the same substrate. By spatially separating the functional domains while maintaining integration on a single substrate, the patent reduces mutual interference between transmission and reception elements, thereby preserving polarization characteristics and beam tilt performance while still achieving size reduction.
Solution Approach 2:
Different regions of the substrate are assigned different functional qualities: transmission-oriented elements in transmission regions and reception-oriented elements in reception regions. This local differentiation allows each region to be optimized for its specific function while maintaining overall integration, preventing polarization degradation that would result from uniform treatment of all elements.
3Volume of moving object
If transmission antenna and reception antenna are disposed on one substrate, then antenna size is reduced, but beam tilt characteristics are degraded due to interference
Solution Approach 1:
The antenna array is segmented into distinct transmission regions and reception regions on the same substrate. By spatially separating the functional domains while maintaining integration on a single substrate, the patent reduces mutual interference between transmission and reception elements, thereby preserving polarization characteristics and beam tilt performance while still achieving size reduction.
Solution Approach 2:
The patent utilizes spatial arrangement in multiple dimensions (rows and columns of the antenna array) to separate transmission and reception functions. By distributing elements across different spatial positions and using phase control in multiple dimensions, the system achieves wide-range beam tilt characteristics despite the integrated substrate configuration.
4Reliability
If antenna elements are circularly arranged, then radiation gain is increased and pattern distortion is minimized, but wide-range tilt operations are limited due to interference between antenna elements
Solution Approach 1:
The patent transitions from circular arrangement to a planar matrix array arrangement with elements distributed across rows and columns. This dimensional change enables independent phase control in multiple directions, allowing wide-range beam tilting in both azimuth and elevation planes while maintaining radiation gain through optimized element spacing and feeding networks.
Solution Approach 2:
The patent implements dynamic beam steering capability through electronic phase control of individual antenna elements in the matrix array. This allows the beam direction to be dynamically adjusted across wide angular ranges in both azimuth and elevation, providing adaptability that static circular arrangements cannot achieve.
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 solution minimizes the size of the array antenna while enhancing dual-band and dual-polarization characteristics, achieving wide-range beam tilt capabilities up to ±70° in azimuth and elevation angles.
Implementation Method 1
a first radiation patch configured to receive power from a power feeding patch through an electromagnetic field
Data Source
AI summary
The disclosure relates to an active phased array antenna capable of realizing dual-band dual polarization. The active phased array antenna is divided into a transmission and reception domain, which has a rectangular shape and in which transmission antenna elements and reception antenna elements are enabled, and a reception domain, which has a rectangular shape and is disposed outside the transmission and reception domain and in which the transmission antenna elements are disabled and the transmission antenna elements are enabled so that one substrate is allowed to simultaneously perform transmission and reception functions, thereby reducing the size of the antenna, and simultaneously, improving polarization characteristics and tilt characteristics in a broad band.