Staggered Dual-Beam Antenna Array for Beam Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dual-beam antennas have high costs due to the large number of radiating elements, suffer from low radiation efficiency due to tight coupling, and experience severe gain loss and high power consumption.
Innovation Solution
The design includes a radiation array group with staggered radiating elements in different rows and increased distance between neighboring elements, reducing the number of radiating elements and improving radiation efficiency, while also using a power divider to connect the arrays and enhance beam isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If radiating elements are tightly coupled to reduce antenna size, then device complexity is reduced, but radiation efficiency deteriorates and gain loss increases
Solution Approach 1:
The radiating elements are divided into multiple rows with staggered arrangements. Each row contains elements positioned at different locations, creating segmented groups that reduce mutual coupling effects while maintaining a compact overall antenna structure. This segmentation allows each element to radiate more effectively without being overly influenced by adjacent elements.
Solution Approach 2:
The patent transitions from a single-row or simple grid arrangement to a multi-row staggered configuration. By adding the row dimension and staggering elements within rows, the design creates three-dimensional spatial separation that reduces coupling in the horizontal plane while maintaining vertical compactness. This dimensional approach allows tighter overall packaging without sacrificing individual element performance.
2Device complexity
If radiating elements are shared between beams to reduce element count, then device complexity is reduced, but beam isolation deteriorates
Solution Approach 1:
Radiating elements are segmented into different rows that can be selectively activated for different beams. Instead of all elements being tightly coupled and shared equally, the staggered row structure allows certain rows to be assigned to specific beams, reducing interference between beams while still using a reduced total element count compared to fully independent beam structures.
Solution Approach 2:
The patent enables dynamic control of which radiating elements are active for which beam. Through electronic switching and phased array techniques, different combinations of staggered elements can be activated to form different beam patterns, providing flexible beam isolation without requiring physical separation of all elements dedicated to each beam.
3Device complexity
If phase difference is fixed at ±90 degrees in Butler matrix to simplify design, then device complexity is reduced, but beam pointing accuracy deteriorates across broadband range
Solution Approach 1:
The patent replaces the fixed ±90 degree phase shifting of Butler matrices with dynamic, electronically controllable phase shifters that can adjust phase differences adaptively. This allows the phase relationship between elements to be optimized for different frequencies and beam directions in real-time, maintaining accurate beam pointing across a broadband range while still using a manageable control structure through digital signal processing.
Solution Approach 2:
Instead of being constrained to fixed phase values, the system allows phase parameters to be changed dynamically based on operating conditions. The staggered element geometry combined with variable phase control enables the system to compensate for frequency-dependent phase variations, maintaining beam accuracy across bandwidth while keeping the overall control architecture relatively simple through algorithmic phase adjustment.
Data Source
AI summary
A radiation array group for a dual-beam antenna includes a first radiation array and a second radiation array. The first radiation array is configured to form a first beam. The second radiation array is configured to form a second beam. Either one of the first radiation array and the second radiation array includes at least two radiating element rows. Each radiating element row of the at least two radiating element rows includes two radiating elements. The at least two radiating element rows are not always aligned with each other.