Multi-fed Patch Antenna Differential Feeding
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Solution Overview
Problem
Existing patch antennas face challenges in achieving high power efficiency and compact size, especially in mobile applications where space is limited, leading to increased power consumption and heat generation due to high transmission power requirements for minimizing signal attenuation in high frequency bands.
Innovation Solution
The implementation of a multi-fed patch antenna structure with differential signal feeding through multiple feed lines, which supplies signals with opposite phases to separate feed points on the antenna, enhancing power efficiency and reducing signal attenuation while maintaining antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high transmission power is employed to minimize signal attenuation in high frequency bands, then signal transmission quality is improved, but power consumption and heat generation increase
Solution Approach 1:
The patent divides the single feed structure into multiple feed lines (first feed line and second feed line) that supply differential signals to different feed points on the patch antenna. This segmentation allows for more efficient power distribution and reduces overall power consumption while maintaining signal transmission quality through constructive interference of the radiated fields.
2Reliability
If high transmission power is employed to minimize signal attenuation in high frequency bands, then signal transmission quality is improved, but heat generation increases
Solution Approach 1:
By segmenting the feed structure into multiple differential feed lines, the patent reduces the power required from each individual power amplifier, thereby reducing heat generation. The differential signaling and multiple feed points create more efficient radiation patterns that achieve the same EIRP with lower total power input, directly addressing the heat generation problem.
3Area of moving object
If the antenna size is reduced for mobile applications, then device compactness is improved, but power efficiency deteriorates
Solution Approach 1:
The patent uses multiple feed points and differential signaling to create a more efficient radiation pattern from the compact patch antenna. This allows the smaller antenna to achieve higher effective radiated power and better power efficiency by utilizing the constructive interference effects and improved impedance matching provided by the multi-fed structure.
Solution Approach 2:
The patent changes the feeding parameters by introducing multiple feed lines with specific impedance values (50 ohms each) and differential signaling. This parameter change optimizes the power transfer efficiency and radiation characteristics of the compact antenna, improving power efficiency without requiring larger dimensions.
4Area of moving object
If the antenna size is reduced for mobile applications, then device compactness is improved, but transmission power requirements increase
Solution Approach 1:
By dividing the feeding system into multiple differential feed lines, the patent improves the radiation efficiency of the compact antenna. This allows the smaller antenna to achieve the required Effective Isotropic Radiated Power (EIRP) with lower transmission power by reducing losses and improving power transfer efficiency through the differential signaling and optimized feed structure.
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 approach allows for high transmission power without reducing antenna performance, achieving increased Effective Isotropic Radiated Power (EIRP) and wider beamwidth, while reducing power consumption and heat generation, and enabling miniaturization of RF systems.
Implementation Method 1
a first patch parallel to the RFIC chip and having an upper surface configured to emit radiation in a vertical direction opposite the first patch from the RFIC chip
Data Source
AI summary
A radio frequency (RF) device may include a radio frequency integrated circuit (RFIC) chip and an antenna module on an upper surface of the RFIC chip. The antenna module may include a first patch parallel to the RFIC chip and having an upper surface configured to emit radiation in a vertical direction opposite the first patch from the RFIC chip, a ground plate parallel to the first patch, and between the first patch and the RFIC chip, and a first plurality of feed lines connected to a lower surface of the first patch and configured to supply at least one first differential signal to the first patch from the RFIC chip.