Tilted Millimeter Wave Array Antennas for Interference Reduction
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Solution Overview
Problem
In display devices with multiple communication units operating in close proximity, the interference between radio waves of different frequency bands leads to reduced receiving sensitivity, affecting communication quality.
Innovation Solution
The use of tilted array antennas for communication units operating in different millimeter wave frequency bands, with one antenna plane tilted between 10 to 30 degrees relative to the other, reduces interference and maintains receiving sensitivity by spacing normal vectors apart and optimizing beam steering and carrier aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple communication units are arranged closely in a limited space to simultaneously use radio waves in different frequency bands, then the device can receive large volume image data through wireless communication, but the radio waves from one communication unit interfere with another communication unit, lowering receiving sensitivity
Solution Approach 1:
The patent applies dimensional change by tilting the plane of the second array antenna relative to the first array antenna at an angle of 10-30 degrees. This spatial reorientation separates the radiation patterns of the two communication units in three-dimensional space, reducing mutual interference while maintaining compact form factor. The tilted configuration creates angular separation between the communication units' operating directions, effectively using spatial dimensionality to resolve the interference problem.
2Volume of moving object
If multiple communication units are arranged closely to each other, then the device structure remains compact, but the radio waves generated from one communication unit affect the communication by another communication unit
Solution Approach 1:
The patent uses spatial reorientation by tilting the second array antenna plane at 10-30 degrees relative to the first array antenna plane. This angular separation in three-dimensional space reduces radio wave interference between closely positioned communication units, allowing compact device design without sacrificing communication performance. The tilted configuration directs radiation patterns away from each other, minimizing harmful interference while maintaining small form factor.
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 configuration enhances communication quality by minimizing interference between communication units, maintaining high receiving sensitivity and enabling effective beam steering and carrier aggregation, even in crowded frequency environments.
Implementation Method 1
a first communication unit which has a first array antenna, the first communication unit transmits and receives wireless radio waves of a first frequency in a millimeter wave band via the first array antenna
Implementation Method 2
the radio waves generated from one communication unit may affect the communication by another communication unit, thus lowering the receiving sensitivity
Data Source
AI summary
A projector includes a wireless communication unit which wirelessly receives image data from a transmitting device, and a display unit which displays an image based on the image data received by the wireless communication unit. The wireless communication unit includes a first communication unit which has a first array antenna, and a second communication unit which has a second array antenna. The first communication unit transmits and receives wireless radio waves of a first frequency in a millimeter wave band via the first array antenna, and the second communication unit transmits and receives wireless radio waves of a second frequency in a millimeter wave band that is different from the first frequency via the second array antenna. A plane including the second array antenna is tilted at an angle of 10 degrees or more and 30 degrees or less to a plane including the first array antenna.