Integrated Radio Antenna Filter Unit for Space Reduction
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Solution Overview
Problem
Existing radio device base station antenna end filter arrangements require significant space and incur high manufacturing costs due to the large size of bandpass filters needed for sufficient stop attenuation, leading to increased current consumption and heating issues.
Innovation Solution
Implementing a shared filter unit where initial filtering of the transmitting signal occurs before division, with the remaining filtering done separately on each partial signal using a reduced duplex filter, connected via simple coupling elements, forming an integrated filter unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate bandpass filters are used for each antenna to achieve sufficient stop attenuation, then filtering performance is improved, but space requirements and manufacturing costs increase
Solution Approach 1:
The patent combines the filtering functions for multiple antennas into a single shared bandpass filter unit. Instead of having separate bandpass filters for each antenna, the invention merges them into one common filter that serves all antennas, thereby reducing the total space required while maintaining the necessary filtering performance through proper signal distribution architecture
Solution Approach 2:
The shared bandpass filter unit is designed to serve multiple antennas simultaneously, making it a multi-functional component. This universal filter handles the filtering requirements for all antenna sectors, eliminating the need for duplicate filtering hardware and reducing overall system complexity and space occupation
2Reliability
If separate bandpass filters are used for each antenna to achieve sufficient stop attenuation, then filtering performance is improved, but manufacturing costs increase
Solution Approach 1:
By merging the filtering functions into a single shared bandpass filter unit, the invention reduces the total number of filter components required. This consolidation decreases manufacturing costs through reduced component procurement, assembly operations, and quality testing, while the shared filter maintains adequate filtering performance for all antenna sectors
Solution Approach 2:
The universal shared filter serves multiple antennas, reducing the bill of materials and manufacturing complexity. Instead of producing and assembling separate filters for each antenna, the system uses one multi-functional filter unit, thereby lowering production costs and simplifying the manufacturing process
3Loss of energy
If larger bandpass filters are used to reduce losses, then signal transmission quality is improved, but space requirements increase
Solution Approach 1:
The shared bandpass filter design reduces the total filter loss by eliminating redundant filtering stages. Instead of having multiple separate filters each contributing to signal attenuation, the system uses a single optimized filter that provides the necessary filtering with minimal loss, thereby improving signal transmission quality without requiring larger physical dimensions
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 significantly reduces space requirements, simplifies the antenna end structure, and lowers material and assembly costs by sharing the filter system among partial signals, achieving minimal losses and efficient signal transmission.
Implementation Method 1
The transmitting side TXF1 of the duplex filter is also of the bandpass type, and it attenuates the frequency components outside the transmitting band of the radio system
Implementation Method 2
Before the filter TXF1 on the transmission path there is a low-pass filter LPT, the task of which is to clean the range above the transmitting band even more of spurious transmissions
Implementation Method 3
Before the low-pass filter LPT on the transmitting side there is a directional coupler DCO, by which the strength of the field propagating through it towards the antenna is measured
Implementation Method 4
The antenna end filters are preferably coaxial resonator filters, because their losses are relatively low
Data Source
AI summary
An arrangement for filtering the transmitting signals in a radio device using frequency division duplex. In a radio transmitter, in which the transmitting signal is divided to a plurality of antennas radiating to different sectors, the filtering required in transmitting is mostly carried out by a shared transmitting filter before the transmitting signal is divided. The rest of the filtering is carried out separately on each partial transmitting signal in the reduced transmitting side of the duplex filter. The filters and the divider form an integrated filter unit, in which they are connected to each other by simple coupling elements. The space required for the filters of the antenna end of the radio device is significantly reduced, and the material and assembly costs of the antenna end in production are reduced.