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A 66-76 GHz Wide Dynamic Range GaAs Transceiver for Channel Emulator Application
Peigen Zhou1, Chen Wang1, Jin Sun1
1State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
Micromachines
|May 28, 2022
Summary
This study presents a 66-67 GHz channel emulator module featuring a wide dynamic range monolithic integrated circuit. The module offers suppressed spurious components and excellent clutter suppression for advanced millimeter-wave applications.
Area of Science:
- Millimeter-wave integrated circuit design
- RF and microwave engineering
- Semiconductor device fabrication
Background:
- Accurate emulation of radio frequency (RF) channels is crucial for testing and validating advanced communication systems.
- Existing solutions may lack the required dynamic range, spurious signal suppression, or integration capabilities for millimeter-wave frequencies.
- The E-band (60-90 GHz) spectrum presents significant opportunities for high-bandwidth communication, necessitating specialized test equipment.
Purpose of the Study:
- To develop a high-performance single-channel channel emulator module operating in the 66-67 GHz band.
- To achieve a wide dynamic range and effective suppression of unwanted signals.
- To facilitate seamless integration with existing E-band test equipment.
Main Methods:
- Design of a wide dynamic range monolithic integrated circuit (MMIC) using a 0.1 µm pHEMT GaAs process.
- Integration of a printed circuit board (PCB) power supply bias network.
- Development of a low-loss ridge microstrip line to WR12 waveguide transition structure.
- On-chip implementation of multistage band-pass filters at the local oscillator (LO) and radio frequency (RF) ports.
- Inclusion of a frequency-selective filter within the LO chain.
Main Results:
- The module achieves an output power dynamic range exceeding 50 dB with significantly suppressed spurious components at the RF port.
- Clutter suppression in the LO chain surpasses 40 dBc due to the integrated frequency-selective filter.
- Up and down conversion loss is below 14 dB across the 66-67 GHz band.
- Measured IF input P1 dB is better than 10 dBm.
- A low-loss (less than 0.4 dB) WR12 waveguide output interface is realized.
Conclusions:
- The developed single-channel channel emulator module effectively meets the demands for precise millimeter-wave channel emulation in the 66-67 GHz band.
- The MMIC design, integrated filtering, and waveguide transition enable superior performance in terms of dynamic range and signal purity.
- The module's design facilitates direct connection to E-band instruments, simplifying testing and development workflows.
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