Integrated Antenna Unit with PCB Reflector and Filter Lid
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Solution Overview
Problem
Traditional antenna systems face challenges in high-rise building coverage, capacity lift, and in-building capacity growth due to limited directive antennas and high costs, with Massive MIMO antennas facing issues of weight, size, and integration flexibility.
Innovation Solution
A radiating integrated antenna unit with dual-polarized monopole radiating elements and integrated band-pass filters on a PCB, eliminating the need for low-pass filtering and using the PCB as both a filter lid and reflector, reducing weight and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional Massive MIMO antennas use cavity backed filters with separate hardware components, then filtering function is achieved, but weight and size increase significantly
Solution Approach 1:
The patent combines the filter housing, radiating elements, and reflector into a single integrated antenna unit. The filter housing serves as both the enclosure for the filtering function and the structural support for the radiating elements, eliminating the need for separate hardware components and reducing overall weight.
Solution Approach 2:
The filter housing performs multiple functions: it provides the filtering function, serves as the structural enclosure, supports the radiating elements, and acts as the reflector. This multi-functionality reduces the number of separate components needed, thereby reducing weight and size.
2Reliability
If traditional Massive MIMO antennas use separate hardware components for filtering and radiation, then filtering is achieved, but device complexity increases
Solution Approach 1:
The patent merges the filter housing, radiating elements, and reflector into a single integrated unit, reducing the number of separate components and simplifying the overall device structure while maintaining the filtering function.
3Reliability
If additional reflectors are used with band-pass filters, then radiation efficiency is improved, but weight and device complexity increase
Solution Approach 1:
The filter housing serves as both the enclosure for the filtering function and the reflector for the radiating elements. This eliminates the need for additional separate reflectors, reducing weight while maintaining radiation efficiency.
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 achieves low-frequency radiation with improved inter-port isolation and cost-effectiveness, simplifying the band-pass design and enabling efficient beam control without additional reflectors.
Implementation Method 1
Each integrated filtering device comprises two band-pass filters and a PCB serving as a filter lid of both the band-pass filters
Implementation Method 2
two radiating elements extend upwards from a top surface of the PCB. Each radiating element is dual-polarized with one monopole for each polarization
Implementation Method 3
a PCB serving as a filter lid of both the band-pass filters and covered on top ends of the filters
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
An integrated antenna unit (10) is proposed where two dual-polarized radiating elements (1) are connected on a PCB (21) serving reflecting board as well as a filter lid of two-band pass filters (20). Each of two band-pass filter (20) is connected directly to a two-way power splitter (25) serving connection of same polarization from the two radiating elements (1). Two walls (21a) (21b) running parallel are extending at the band-pass filter edges to support the cavity of the filters (20) and at same time serving as reflecting walls enabling to control the 3dB azimuth beam generated by the radiating elements (1). Next, a multi-array antenna (100) is proposed by collocating multiple arrays of the integrated antenna units (10).