研究目的
Investigating the performance improvement of a Composite Right-/Left-Handed (CRLH) distributed oscillator by modifying its standard configuration to increase output power and reduce higher order harmonics.
研究成果
The modified CRLH distributed oscillator with a Wilkinson combiner shows improved output power and reduced second harmonic levels compared to the standard configuration. Experimental results validate the numerical predictions, demonstrating the effectiveness of the proposed modification.
研究不足
The study is limited to the analysis of output power and harmonic performance of CRLH distributed oscillators. The optimization is focused on the number of transistors and the use of a Wilkinson combiner, potentially overlooking other factors that could influence performance.
1：Experimental Design and Method Selection:
The study involves modifying the standard CRLH distributed oscillator configuration by combining signals from two output ports using a Wilkinson combiner to achieve a single output generator. The performance is compared numerically and experimentally by varying the number of transistors.
2：Sample Selection and Data Sources:
The study uses simulated data from a nonlinear software package and experimental results from fabricated circuits.
3：List of Experimental Equipment and Materials:
Includes MGF 4941AL InGaAs HEMT transistors, RT/duroid 5870 substrate, and a Wilkinson combiner.
4：Experimental Procedures and Operational Workflow:
The design involves replacing lumped elements in the CRLH basic cell with transmission lines, simulating the oscillators with different numbers of transistors, and measuring output power and harmonics.
5：Data Analysis Methods:
The analysis includes comparing output power and harmonic levels between the standard and modified oscillator configurations.
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