Common-Gate Receiver Front End for Multi-Band Millimeter-Wave Tuning
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Solution Overview
Problem
Wireless receiving devices face challenges in operating across different frequency bands, particularly in millimeter-wave frequencies like 5G and WiGig, due to the need for additional components and higher noise figures.
Innovation Solution
A wireless receiving device with a common gate amplifier that automatically adjusts its input impedance based on the oscillation frequency, using a combination of passive mixers and low-noise amplifiers to maintain optimal performance across various frequency bands without requiring extra elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple low-noise amplifiers are configured to operate in different frequency bands, then the receiving device can support multiple frequency bands, but the manufacturing area increases and device complexity increases
Solution Approach 1:
The common gate amplifier is designed to perform multiple functions across different frequency bands. By configuring the amplifier to operate in both first and second frequency bands with automatic input impedance adjustment, a single amplifier structure replaces what would traditionally require multiple separate amplifiers, thereby reducing device complexity while maintaining multi-band support capability
Solution Approach 2:
The input impedance of the common gate amplifier is made dynamically adjustable based on the oscillation frequency. The amplifier automatically changes its input impedance according to whether it is operating in the first or second frequency band, enabling a single static structure to adapt to different frequency requirements without requiring multiple fixed-impedance amplifier circuits
2Adaptability or versatility
If multiple low-noise amplifiers are configured to operate in different frequency bands, then the receiving device can support multiple frequency bands, but the manufacturing area increases
Solution Approach 1:
The patent merges the functionality of multiple frequency-band-specific amplifiers into a single common gate amplifier structure. By combining the first and second frequency band operations into one amplifier with automatic impedance adjustment, the physical area required is reduced compared to having separate amplifiers for each frequency band, thus decreasing the manufacturing area while maintaining multi-band support
3Adaptability or versatility
If the receiving device is applied in millimeter-wave frequency bands, then it can support 5G and WiGig standards, but higher noise figures occur
Solution Approach 1:
The input impedance parameter of the common gate amplifier is automatically adjusted based on the oscillation frequency when operating in millimeter-wave bands. By changing the input impedance parameter to match the specific frequency band (first or second band), the amplifier maintains optimal noise performance across different millimeter-wave frequencies, preventing the degradation of noise figure that would otherwise occur in broadband millimeter-wave operation
Data Source
AI summary
A wireless receiving device is provided. The wireless receiving device includes a first passive mixer and a common gate amplifier. The first passive mixer receives an oscillation signal. The common gate amplifier is coupled to the first passive mixer, and automatically adjusts the input impedance of the common gate amplifier according to the oscillation frequency of the oscillation signal.