Dual-Band Feed Waveguide Layout for Antenna Self-Tracking
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Solution Overview
Problem
Dual-band antennas face limitations in anti-shake performance and self-tracking precision due to narrow beam width and deviation of maximum gain angle, particularly in high-frequency signals, which affects transmission stability and distance.
Innovation Solution
A dual-band feed system with a service waveguide and symmetrically disposed amplitude comparison waveguides, allowing for self-tracking adjustments based on signal gain differences to align the maximum gain direction, reducing processing complexity and improving anti-shake performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate feed sources are used for different frequency bands, then frequency coverage is improved, but device complexity increases
Solution Approach 1:
A single feed source is designed to support multiple frequency bands (e.g., 28 GHz and 3.5 GHz) by incorporating multiple variable impedance transformation units, each configured for different frequency ranges. This allows one feed source to replace what would traditionally require separate feed sources for each band, reducing device complexity while maintaining broad frequency coverage
Solution Approach 2:
The feed source is divided into multiple variable impedance transformation units, with each unit optimized for specific frequency bands. This segmentation allows independent control and optimization for different frequencies while sharing a common feed structure, resolving the contradiction between multi-band support and device simplicity
2Loss of energy
If impedance matching structures are added to improve power transfer, then power transfer efficiency is improved, but device complexity increases
Solution Approach 1:
The variable impedance transformation units are integrated directly into the feed source structure rather than being separate components. This merging of impedance matching functions with the feed source reduces the number of discrete parts and simplifies the overall device while maintaining effective power transfer across multiple frequency bands
Solution Approach 2:
The feed source structure serves dual functions: it provides the electromagnetic feed signal and simultaneously performs impedance matching for multiple frequency bands through its integrated variable impedance transformation units, eliminating the need for separate impedance matching structures
3Ease of operation
If frequency-selective surfaces are used to control electromagnetic waves, then wave control capability is improved, but device complexity increases
Solution Approach 1:
The patent transitions from controlling electromagnetic waves in the near-field region to radiating in the far-field region. This dimensional change in operational regime simplifies the wave control requirements, as far-field radiation naturally provides directional control and reduced interference compared to near-field manipulation with frequency-selective surfaces
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
Enhances receiving performance and stability of dual-band antennas by improving gain and reducing processing complexity, ensuring uplink performance and alignment even in the presence of deflections.
Implementation Method 1
a plurality of variable impedance transformation units respectively corresponding to a plurality of frequency bands, wherein each of the variable impedance transformation units is configured to transform impedance of an electromagnetic signal in a corresponding frequency band to impedance matched to an impedance of the radiation pattern generation unit
Implementation Method 2
a radiation pattern generation unit configured to radiate, in different frequency bands, electromagnetic signals with different radiation patterns
Data Source
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AI summary
This application provides a dual-band feed, an antenna device, and a wireless communication device. The dual-band feed is configured to improve an anti-shake capability of a dual-band antenna. The dual-band feed includes a service waveguide and a plurality of amplitude comparison waveguides located outside the service waveguide. The service waveguide includes an outer waveguide and an inner waveguide nested inside the outer waveguide, the inner waveguide is coaxial with the outer waveguide, and the plurality of amplitude comparison waveguides include a first amplitude comparison waveguide and a second amplitude comparison waveguide that are symmetrically disposed relative to an axis of the outer waveguide. A first end of the inner waveguide, a first end of the outer waveguide, and first ends of the plurality of amplitude comparison waveguides are respectively configured to receive a first signal, a second signal, and a third signal in a beam. Second ends of the plurality of amplitude comparison waveguides are configured to connect to a self-tracking module, and the self-tracking module is configured to adjust a maximum gain direction of the antenna. This helps improve receiving performance of the antenna device and improve anti-shake performance of the antenna device. When the received beam carries communication information, uplink performance is ensured.