Wireless Antenna Phase Shifter for Directivity Control
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Solution Overview
Problem
Existing wireless communication apparatuses with diversity reception capabilities have insufficient transmission performance as they only utilize one antenna for transmission, limiting their overall directivity and efficiency.
Innovation Solution
A wireless communication apparatus that includes multiple antennas for both reception and transmission, utilizing a divider to distribute signals among the antennas and a phase shifter to adjust the phase shift, allowing for improved directivity and transmission performance by using both antennas for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only one antenna is used for transmission in a diversity reception system, then the system structure remains simple, but transmission performance is insufficient
Solution Approach 1:
The patent makes the antenna system multi-functional by enabling both antennas to perform dual roles: diversity reception and coordinated transmission. The switching circuit allows the antenna system to adapt between reception mode (using one antenna) and transmission mode (using both antennas with phase control), achieving universality without requiring separate dedicated antennas for each function.
Solution Approach 2:
The patent introduces dynamic phase control through phase shifters in the transmission paths of both antennas. The phase of transmitted signals can be dynamically adjusted to achieve beamforming and directional transmission, transforming the static antenna system into a dynamic one that can adapt transmission characteristics based on communication requirements.
2Adaptability or versatility
If both antennas are used for transmission with phase shifting, then directivity can be adjusted appropriately, but the device complexity increases due to additional components
Solution Approach 1:
The switching circuit serves multiple functions: it selects antennas for reception, enables both antennas for transmission, and configures phase shifter connections. This multi-functionality reduces the need for separate dedicated components for each operation mode, thereby limiting the increase in overall system complexity despite adding phase control capabilities.
Solution Approach 2:
The patent changes the phase parameter of transmission signals through controllable phase shifters, enabling directivity adjustment and beamforming. By controlling the phase difference between signals from the two antennas, the system can electronically steer the transmission beam without physically moving the antennas, achieving adaptability through parameter modulation rather than structural changes.
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 enhances transmission performance by enabling the adjustment of directivity through phase shifting, effectively improving the apparatus's ability to handle various communication conditions and environments.
Implementation Method 1
a phase shifter located in at least one of multiple transmission lines, each of which connects the divider to a corresponding one of the antennas
Data Source
AI summary
A wireless communication apparatus includes multiple antennas, a receiver for performing diversity reception using the antennas, a transmitter, a selector circuit connected to the antennas, a divider, and a phase shifter. The divider is located in a transmission line which connects the selector circuit to the transmitter and distributes a signal outputted from the transmitter among the antennas during transmission. The phase shifter is located in at least one of multiple transmission lines, each of which connects the divider to a corresponding one of the antennas.