Multi-Mode Millimeter-Wave Communication Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current millimeter-wave communication devices are limited to single pole double throw (SPDT) mode and time division multiple access (TDMA) due to complex feeder structures and large number of switching elements, making them unsuitable for high-frequency applications and unable to operate in both SPDT and power divider modes simultaneously.
Innovation Solution
A multi-mode communication device with substrate integrated waveguide (SIW) or microstrip line configuration, incorporating optical switching elements and a matching element to change impedance, allowing operation in SPDT, power divider, and additional modes, enabling simultaneous signal distribution to multiple ports with reduced component count and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a typical feeding device with switching circuit is used to distribute power between antennas, then multiple polarization modes can be provided, but the device becomes unsuitable for high frequency applications due to complicated feeder structure and large number of switching elements
Solution Approach 1:
The patent merges the feeding device and commutator into a single integrated structure. The feeding device includes a power divider with first and second output arms that directly connect to first and second antennas, eliminating the need for separate switching circuits. This integration reduces the number of discrete components while maintaining the ability to distribute power to multiple antennas for different polarization modes.
Solution Approach 2:
The feeding device is designed to perform multiple functions: it acts as both a power divider and a commutator. The same structure that divides power between output arms also functions as the switching mechanism through the use of switching elements (such as PIN diodes or MEMS) that can be controlled to connect different antennas to different output ports, enabling both power distribution and signal routing capabilities in a single device.
2Adaptability or versatility
If additional antennas are added for middle range and short range modes, then range selection is enabled, but additional space is required and antennas can only operate in time division mode
Solution Approach 1:
The patent combines multiple antenna functions into a single shared antenna structure. Instead of requiring separate antennas for different range modes, the system uses one antenna that can be configured for different operating modes through the integrated feeding device and commutator. The switching elements control which signal paths are active, enabling the same physical antenna to serve multiple range selection purposes without requiring additional antenna elements or space.
3Ease of operation
If a single pole double throw commutator is used for signal switching, then signal routing between ports is achieved, but the device cannot operate in both SPDT and power divider modes simultaneously
Solution Approach 1:
The integrated feeding device and commutator structure is designed to operate in multiple modes. In SPDT mode, the switching elements route the input signal to one of two output ports. In power divider mode, the switching elements are configured to distribute the input signal equally to both output ports simultaneously. The same physical structure and components enable both operating modes through different switching element configurations, providing mode flexibility without requiring separate dedicated circuits for each function.
Data Source
AI summary
A communication device includes an input port, a first output port, a second output port, a first output arm including one end connected to the first output port and another end connected to a branch point and including a first switching element configured to be shorted in a second mode, a second output arm including one end connected to the second output port and another end connected to the branch point and including a second switching element configured to be shorted in a first mode, and an input arm including one end connected to the input port and another end connected to the branch point and including a third switching element configured to introduce a discontinuity into a transmission line in the form of a matching element configured to change an impedance of the input arm in a divider mode.