Offset Gregorian Antenna Layout for Accurate 60 GHz Beam Control
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Solution Overview
Problem
Existing Gregorian antenna arrangements are not suitable for consumer and commercial applications operating at frequencies of 60 GHz and above, as they require high antenna gain, compactness, and low cost while maintaining accurate control of antenna beam direction.
Innovation Solution
A wireless transceiver with an offset Gregorian antenna arrangement, comprising a primary reflector dish, a metallic electrically conductive reflector member with a secondary reflector and conductive support wall, a planar array of antenna elements, and a conductive support block, which provides precise location and control of the secondary reflector with respect to the planar array, reducing spurious radiation and passive intermodulation interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a Gregorian antenna arrangement is used to provide high antenna gain, then antenna gain is improved, but the arrangement becomes complex and difficult to manufacture for consumer applications
Solution Approach 1:
The conductive support wall is integrated directly with the conductive support block, eliminating separate mounting structures. This merging of components simplifies the overall arrangement while maintaining the high antenna gain performance of the Gregorian configuration.
Solution Approach 2:
The conductive support block serves multiple functions: it supports the planar array of antenna elements, provides a mounting surface for the conductive support wall, and acts as a structural anchor for the secondary reflector. This multi-functionality reduces the number of separate components needed.
2Measurement precision
If the secondary reflector position is precisely controlled to maintain accurate beam direction, then beam direction accuracy is improved, but the manufacturing and assembly precision requirements increase
Solution Approach 1:
The conductive support wall is pre-positioned and fixed to the conductive support block at precise angles and locations. This preliminary positioning establishes accurate reference surfaces that guide the placement of the secondary reflector, ensuring correct beam direction without requiring ultra-precise final assembly.
Solution Approach 2:
The conductive support wall's perpendicular orientation to the planar array and its direct connection to the support block creates a self-aligning structure. The rigid mechanical connection automatically maintains the correct geometric relationships, reducing the need for external adjustment mechanisms.
3Ease of operation
If a compact design is implemented for consumer installations, then ease of installation is improved, but space for precise component positioning is reduced
Solution Approach 1:
The conductive support wall is positioned within the structural envelope of the conductive support block, with the secondary reflector mounted on the support wall in a nested configuration. This nesting arrangement maximizes component density while maintaining correct geometric relationships, achieving compactness without sacrificing positioning precision.
4Object-generated harmful factors
If the conductive support wall is extended beyond the support block face, then spurious radiation is reduced, but the device complexity increases
Solution Approach 1:
The conductive support wall is extracted as a distinct functional element from the support block, extending beyond the block face to specifically address spurious radiation. This separation of functions allows the wall to be optimized for radiation control while the block maintains its structural support role.
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 offset Gregorian antenna arrangement achieves high antenna gain, compact design, and precise control of antenna beam direction, suitable for high-frequency applications, while minimizing radiofrequency signal loss and spurious radiation.
Implementation Method 1
a planar array of antenna elements arranged as a feed for transmitting radio frequency signals to the secondary reflector
Implementation Method 2
the conductive support wall prevents spurious radiation from the planar array of antenna elements
Implementation Method 3
an offset Gregorian antenna arrangement comprising a primary reflector dish, an electrically conductive reflector member comprising a secondary reflector
Data Source
AI summary
A wireless transceiver for a wireless communication network has an offset Gregorian antenna arrangement comprising a primary reflector dish, an electrically conductive reflector member comprising a secondary reflector and a conductive support wall, a planar array of antenna elements arranged as a feed for transmitting radio frequency signals to the secondary reflector and/or for receiving radio frequency signals from the secondary reflector and a conductive support block configured to support the planar array of antenna elements. The conductive support wall is connected directly to the conductive support block, and the conductive support wall is configured to be substantially perpendicular to the planar array of antenna elements.