Full-Duplex Repeater Antenna Isolation via Spatial Separation
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Solution Overview
Problem
In 5G wireless communication systems, severe interference occurs between transmitting and receiving antenna arrays of repeaters, which hampers the operation of full-duplex repeaters, especially in high-frequency bands used for 5G NR communication, necessitating enhanced isolation between the Donor and Relay antennas.
Innovation Solution
The implementation of a wireless communication system utilizing Space Division Duplex (SDD) architecture with predetermined spatial separation and orthogonal polarizations between the down-link and up-link circuits, along with a short side displacement for the third antenna array of the CPE, to achieve improved isolation and gain balance, thereby reducing interference and enabling proper operation of full-duplex repeaters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If repeaters are used to extend transmission distance and coverage in 5G systems, then coverage is improved, but interference between transmitting and receiving antenna arrays increases
Solution Approach 1:
The patent applies spatial separation by positioning the down-link and up-link antenna arrays at different locations and orientations in three-dimensional space. The first antenna array is disposed at a first location with a first orientation, while the second antenna array is disposed at a second location with a second orientation that differs from the first orientation. This dimensional separation in space allows full-duplex operation by reducing spatial interference between simultaneous transmit and receive operations.
Solution Approach 2:
The patent employs asymmetric configuration of the antenna arrays where the orientations are deliberately made different from each other. The first antenna array has a first orientation and the second antenna array has a second orientation that is asymmetric relative to the first. This asymmetric spatial arrangement creates directional isolation between the transmitting and receiving paths, enabling the repeater to handle simultaneous uplink and downlink signals without severe self-interference.
2Speed
If high frequency signals are utilized in 5G NR communication, then data rates are improved, but interference between Donor Tx/Rx and Relay Tx/Rx antenna isolation deteriorates
Solution Approach 1:
The patent utilizes three-dimensional spatial separation to achieve isolation between Donor and Relay antenna systems. By disposing antenna arrays at different locations and orientations in space, the system creates spatial diversity that provides isolation between the high-frequency Donor Tx/Rx and Relay Tx/Rx paths, enabling reliable full-duplex operation at 5G NR frequencies.
Solution Approach 2:
The patent applies different orientations and spatial configurations to different antenna arrays locally. The first antenna array is configured with a first orientation at a first location, while the second antenna array has a different orientation at a different location. This localized spatial optimization provides direction-specific isolation that maintains reliability for high-frequency 5G NR communication by reducing interference between co-located transmitting and receiving antenna systems.
Data Source
AI summary
A wireless communication system includes a base station, a customer premise equipment (CPE) and a repeater. The repeater includes a down-link circuit and an up-link circuit. The down-link circuit includes a first receiving antenna array and a first transmitting antenna array, and the up-link circuit includes a second receiving antenna array and a second transmitting antenna array. The down-link circuit is separated from the up-link circuit with a first predetermined distance.