Wireless Module Antenna Feed Line Amplifier
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Solution Overview
Problem
Existing wireless modules, such as slot array and microstrip array antennas, face challenges in achieving high gain due to transmission loss and interference from RFICs, as they lack conductive wiring lines for signal amplification and experience phase delays with increasing distance from the input end.
Innovation Solution
A wireless module with a dielectric substrate, conductive ground layer, serial-type radiation element rows, and a parallel feed line that branches into multiple rows with amplifiers connected along the feed line, ensuring identical path lengths and reducing interference by aligning radiation elements in a grid pattern and placing amplifiers halfway along the feed line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of stubs and parasitic elements is increased to achieve high gain, then the antenna gain is improved, but the path length of the feed line increases causing increased transmission loss
Solution Approach 1:
An amplifier is introduced as an intermediary component in the feed line to compensate for transmission loss. The amplifier is positioned at a specific distance from the input end, acting as a mediator that boosts the signal strength after it has traveled through a portion of the feed line, thereby enabling high gain without excessive transmission loss.
Solution Approach 2:
The amplifier is placed in advance at a predetermined position in the feed line to proactively compensate for transmission loss before it significantly degrades the signal. This preliminary action ensures that the signal is boosted at the right moment in its transmission path, maintaining optimal performance throughout the antenna array.
2Device complexity
If stubs and parasitic elements are aligned along the feed line, then the antenna structure is simplified, but phase delay increases with distance causing radiation interference toward the input end
Solution Approach 1:
The radiation elements are arranged asymmetrically with respect to the feed line, specifically positioned at locations that direct radiation away from the input end. This asymmetric arrangement prevents the formation of strong radiation lobes toward the RFIC, reducing interference while maintaining structural simplicity.
Solution Approach 2:
The harmful radiation component toward the input end is effectively extracted or eliminated by carefully selecting the positions of radiation elements along the feed line. Elements are placed only at distances that produce constructive interference in desired directions while avoiding phases that would create interference toward the input end.
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 achieves high-gain antenna performance while minimizing radio wave interference from RFICs and compensates for transmission losses through signal amplification, allowing for efficient radio wave transmission and reception.
Implementation Method 1
an amplifier that is connected to the parallel feed line on a halfway portion of the parallel feed line, and amplifies a signal passing through the parallel feed line
Implementation Method 2
the plurality of radiation elements being connected in series and aligned linearly at regular intervals in a direction approaching to the RFIC
Data Source
AI summary
A high gain of an antenna is achieved while suppressing interference of a radio wave from an RFIC. A plurality of serial-type radiation element rows 41 are arranged in parallel. A parallel feed line 45 branches from a feed terminal of an electronic component 11, and connects radiation elements 42, at ends of the serial-type radiation element row 41 farthest from the electronic component 11, to the feed terminal of the electronic component 11. All of the serial-type radiation element rows have an identical path length, along the parallel feed line 45, from each of the radiation elements 42 at the ends farthest from the electronic component 11 to the feed terminal of the electronic component 11. An amplifier 61 is connected to the parallel feed line on a halfway portion of the parallel feed line 45. The amplifier 61 amplifies a signal passing through the parallel feed line 45.