Dual-Polarized Waveguide Antenna with Integrated Filter
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Solution Overview
Problem
Conventional radio systems face challenges in preventing spurious radio transmissions in frequency bands other than the desired frequency, leading to interference with other systems and legal compliance issues, often requiring bulky and expensive filtering hardware.
Innovation Solution
The integration of a waveguide filter within the antenna structure, featuring a bandpass filter with resonant cavities, which selectively passes desired electromagnetic frequencies while rejecting unwanted frequencies, reducing spurious emissions and improving system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional filtering hardware is used to prevent spurious radio transmissions, then frequency band isolation is improved, but device size and cost increase
Solution Approach 1:
The patent combines the filtering function with the antenna structure by integrating resonant cavities directly into the antenna elements. The resonant cavities are formed as part of the antenna housing structure, merging two previously separate functions (antenna radiation and frequency filtering) into a single integrated component, thereby eliminating the need for separate filtering hardware.
Solution Approach 2:
The antenna structure is designed to perform multiple functions simultaneously: it serves as both the radiating element and the frequency-selective filter. The resonant cavities within the antenna structure provide frequency discrimination while the antenna elements provide radiation, making the system multi-functional and eliminating dedicated filtering components.
2Object-affected harmful factors
If conventional filtering hardware is used to prevent spurious radio transmissions, then frequency band isolation is improved, but device complexity and cost increase
Solution Approach 1:
The filtering function is merged with the antenna structure by incorporating resonant cavities as integral parts of the antenna elements. This integration reduces the number of discrete components and simplifies the overall system architecture, eliminating the need for separate filtering assemblies and reducing device complexity.
Solution Approach 2:
The antenna structure is designed to simultaneously provide radiation and frequency filtering functions. The resonant cavities are formed as part of the antenna housing, creating a multi-functional component that reduces system complexity by eliminating dedicated filtering hardware and reducing the number of parts that need to be assembled and maintained.
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 solution effectively minimizes spurious emissions by using a lightweight, integrated waveguide filter that reduces interference and meets legal requirements, offering a more efficient and cost-effective alternative to conventional filtering methods.
Implementation Method 1
a waveguide filter having at least one resonant waveguide cavity coupled to the second end of the waveguide section. The waveguide filter is configured to pass a first set of electromagnetic frequencies and reject a second set of electromagnetic frequencies
Implementation Method 2
The waveguide section is configured to propagate electromagnetic energy
Data Source
AI summary
In examples, systems and methods for waveguide antenna arrays with integrated filters are described. An example waveguide antenna array element a waveguide section has a first end and second end. The waveguide section is configured to propagate electromagnetic energy. The waveguide antenna array element also includes a feed configured to launch an electromagnetic wave into the first end of the waveguide section. The waveguide antenna array element also includes a waveguide filter having at least one waveguide cavity coupled to the second end of the waveguide section. The waveguide filter is configured to pass a first set of electromagnetic frequencies and reject a second set of electromagnetic frequencies. Yet further, the waveguide antenna array element includes an antenna coupled to the waveguide filter configured to radiate a portion of the electromagnetic energy passed by the waveguide filter.