Stacked Planar Resonator Antenna With Integrated Filtering
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Solution Overview
Problem
Conventional wireless communication systems face challenges in achieving adequate selectivity and reducing signal loss due to separate design and interconnection of antennas and filters, which results in decreased scan volume and increased signal loss.
Innovation Solution
The integration of a filter within each antenna element as a radiating structure, eliminating the need for separate filters and reducing ohmic losses by designing the antenna apparatus with specific resonator dimensions and couplings to achieve desired filtering and radiation functionalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If separate filters are interconnected with antennas, then filtering functionality is provided, but signal loss increases and scan volume decreases
Solution Approach 1:
The patent combines the filter and antenna into a single integrated structure where the resonators serve dual purposes: they provide filtering functionality while simultaneously acting as radiating elements. This eliminates the need for separate filters and interconnection components, thereby reducing ohmic losses and simplifying the overall device structure.
2Adaptability or versatility
If separate filters are interconnected with antennas, then filtering functionality is provided, but scan volume decreases
Solution Approach 1:
The integration of filter and antenna functions into a unified structure removes the physical interconnection components that limit scan volume. The resonators directly radiate electromagnetic energy while providing filtering, enabling greater angular coverage and improved adaptability for phased array applications.
3Manufacturing precision
If resonator dimensions are increased to achieve resonance, then filtering selectivity is improved, but physical size increases
Solution Approach 1:
The patent transitions from traditional planar resonator designs to three-dimensional stacked patch resonators. By utilizing the vertical dimension and stacking multiple resonator patches at different heights, the design achieves improved filtering selectivity without proportionally increasing the horizontal footprint, thereby maintaining compact overall dimensions.
Solution Approach 2:
The stacked patch resonators are arranged in a nested configuration where multiple resonator elements are positioned at different vertical levels within a compact structure. This nesting approach allows multiple resonant modes and improved selectivity while containing the physical dimensions within a smaller volume.
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 approach reduces signal loss and increases scan volume by integrating filtering functionality into each antenna element, allowing for compact structures with smaller grid spacing and improved performance in phased array antennas.
Implementation Method 1
The resonant frequency of such a structure is directly related to physical dimensions of the resonators and the overall structure. Typically, resonance is achieved when the physical dimensions of the resonator approach a half wavelength.
Data Source
Figure 1A~1B
Figure 1C
Figure 2A
AI summary
An antenna apparatus includes an antenna integrated with a filter. The antenna apparatus includes a plurality of planar resonators where at least some of the resonators are each enclosed in a metal cavity and at least one planar resonator is exposed to free space to form a radiator element. The antenna apparatus has a filter transfer function that is at least partially determined by dimensions of the planar radiator element and the position of the planar radiator element within the antenna apparatus.