研究目的
Investigating the performance of a photonics-based wideband emitter module using uni-travelling carrier photodiodes coupled to high gain planar antennas in the 50 to 120 GHz frequency range.
研究成果
The study successfully demonstrated a photonics-based wireless emitter array with a record 3-dB bandwidth of 45 GHz in the 50 GHz to 120 GHz range, achieving a combined radiated power of 214 (cid:2)W at 75 GHz. The scalable design presents potential for photonics-enabled beamsteering applications.
研究不足
The study mentions slight variations in measured power at lower photocurrents due to fluctuations in the TK sensor readings, and a gradual roll-off in power after 110 GHz indicating the frequency cut-off of bias-T and antenna.
1：Experimental Design and Method Selection:
The study involves the design and characterization of a photonic emitter array using UTC-PDs integrated with a 1x2 antenna array. The methodology includes the use of high-speed UTC-PDs and the design of a tapered slot antenna on a Rogers/Duroid 5880 substrate.
2：Sample Selection and Data Sources:
The UTC-PD chips were fabricated at III-V Lab, featuring an active area of 4 x 15 (cid:2)m2. The antenna array was designed for operation in the 50 to 120 GHz range.
3：The antenna array was designed for operation in the 50 to 120 GHz range.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment includes two free-running distributed feedback lasers (Toptica Photonics), a calibrated Thomas Keating (TK) THz power sensor, and an erbium doped fiber amplifier (EDFA). Materials include UTC-PD chips and Rogers/Duroid 5880 substrate.
4：Experimental Procedures and Operational Workflow:
The experiment involved measuring the responsivity of the photodiode, absolute power measurements to characterize the photo-generated mmWave radiated power and RF bandwidth, and frequency response measurements.
5：Data Analysis Methods:
The data analysis involved plotting the measured DC photocurrent versus the optical input power, detected mmWave power at different carrier frequencies against the DC photocurrent, and the frequency response of the emitter array.
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