Modal Antenna RF Amplifier Layout to Cut Transmission-Line Noise
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Solution Overview
Problem
Existing RF amplifier circuits for modal antennas often suffer from signal attenuation due to noise figure associated with transmission lines, requiring separate lines for amplified signals and control signals, which complicates the design and reduces performance.
Innovation Solution
Integrating the RF amplifier circuit on the same circuit board as the modal antenna, eliminating the need for a transmission line to connect the driven element to the amplifier, and using switching devices to control the operation of the low-noise amplifier and transmission of signals, thereby reducing noise and simplifying signal communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transmission line is used to connect the driven element to the RF amplifier circuit, then signal transmission is enabled, but signal attenuation due to noise figure occurs
Solution Approach 1:
The RF amplifier circuit is integrated directly onto the same circuit board as the modal antenna, eliminating the need for separate transmission lines. This merging of components removes the transmission line interface that causes noise figure and signal attenuation, while maintaining full signal transmission capability through direct electrical connection on the board.
2Reliability
If separate transmission lines are used for amplified signals and control signals, then signal interference is reduced, but design complexity increases
Solution Approach 1:
The patent uses switching devices to segment and separate amplified RF signals from control signals within the integrated circuit board environment. This allows both signal types to coexist on the same board without requiring separate physical transmission lines, reducing design complexity while maintaining signal integrity through active switching control.
Data Source
AI summary
An antenna system is provided. The antenna system includes a modal antenna disposed on a circuit board. The modal antenna includes a driven element and a parasitic element. The modal antenna is operable in a plurality of different modes. Each of the plurality of modes has a distinct radiation pattern. The antenna system further includes a radio frequency amplifier circuit disposed on the circuit board. The radio frequency amplifier circuit is coupled between the drive element of the modal antenna and a transmission line.