Integrated Antenna Filter Layout for Compact Radio Units
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Solution Overview
Problem
Modern communication systems face challenges in reducing the size and weight of terminal and node devices while maintaining performance, as merely downsizing units can lead to issues with passive intermodulation, power, and heat, and further miniaturization is difficult to achieve effectively.
Innovation Solution
An antenna filter unit is designed with a radiation unit coupled to a cavity filter, where the radiation unit is arranged on the outer side of the cavity filter's wall, which also serves as a reflection plate, and includes an isolation bar and a pin connector for inductive or capacitive coupling, reducing the number and volume of elements and improving integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the size of radio units is reduced to achieve miniaturization, then the weight and installation space are reduced, but the performance deteriorates due to passive intermodulation, power, and heat issues
Solution Approach 1:
The patent combines the radiation unit and cavity filter into an integrated antenna filter unit. The radiation unit is arranged on the outer side of the cavity filter wall, with the wall serving dual functions as both structural support and reflection plate. This merging eliminates separate connectors and reduces the overall number of components, achieving miniaturization while maintaining performance through optimized electromagnetic field distribution and reduced passive intermodulation.
Solution Approach 2:
The cavity filter wall serves multiple functions simultaneously: it acts as the structural boundary of the cavity, provides electromagnetic reflection through its metallic surface, and eliminates the need for separate connection components. The radiation unit is directly integrated with the cavity structure, allowing the same physical structure to fulfill multiple operational roles, thereby reducing weight and complexity while maintaining reliability.
2Ease of manufacture
If separate independent units are used for radio unit and antenna unit, then the installation and fixation are simplified, but the size and weight increase
Solution Approach 1:
The patent integrates the radiation unit and cavity filter into a single antenna filter unit, eliminating the need for separate radio unit and antenna unit assemblies. This integration reduces the overall volume of the radio system while maintaining ease of installation through the compact, unified structure that requires fewer mounting components and simplifies fixation procedures.
3Reliability
If multiple separate components are used in the radio system, then the functional performance is maintained, but the number and volume of elements increase
Solution Approach 1:
The patent merges multiple functional components into the antenna filter unit, where the cavity filter and radiation unit are integrated with the wall serving as both structural and electromagnetic functional element. This reduces the total number of discrete parts while maintaining functional performance through optimized electromagnetic coupling and field distribution within the integrated structure.
Solution Approach 2:
The cavity filter wall performs multiple functions: it provides the physical boundary of the resonant cavity, acts as an electromagnetic reflection surface, and eliminates the need for separate connection components. This multi-functionality reduces device complexity by having a single structural element fulfill multiple operational roles that would otherwise require separate components.
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 configuration reduces the weight, installation space, and costs of radio systems, enhances integration, and maintains performance by reusing structural components and eliminating the need for separate connectors, resulting in a more compact and efficient design.
Implementation Method 1
the pin connector is configured to be inductively coupled to the resonant column
Implementation Method 2
the pin connector is configured to be capacitively coupled to the resonant column
Implementation Method 3
a cavity filter coupled to the radiation unit. The radiation unit is arranged on an outer side of a wall of a cavity of the cavity filter
Data Source
AI summary
Embodiments of the disclosure provide an antenna filter unit and a radio unit. The antenna filter unit includes a radiation unit and a cavity filter coupled to the radiation unit. The radiation unit is arranged on an outer side of a wall of a cavity of the cavity filter. At least a part of the wall is also arranged as a reflection plate for the radiation unit. The radio unit includes the above-mentioned antenna filter unit and a radio circuit board. According to the antenna filter unit and the radio unit provided by embodiments of the disclosure, the number and volume of elements in a radio system are reduced, the degree of integration can be improved, the weight and installation space are reduced, and the costs are reduced.