研究目的
To design a compact and low insertion loss UWB on-chip bandpass filter using coupled meandered line for UWB communication applications.
研究成果
The proposed UWB BPF achieves a compact size, low insertion loss, and high selectivity, making it suitable for UWB communication systems. The design demonstrates the feasibility of using GaAs IPD technology for high-performance, miniaturized filters.
研究不足
The design's performance may be limited by the fabrication precision of the GaAs IPD technology and the inherent challenges of miniaturization, such as increased insertion loss and worsened return loss due to meandering.
1：Experimental Design and Method Selection:
The design utilizes multistage coupling lines and modified stubs loaded with shorted capacitors to achieve an ultra-wide passband with 100% fractional bandwidth. Stepped impedance resonator (SIR) structure is applied for improved impedance matching.
2：Sample Selection and Data Sources:
The filter is fabricated using GaAs integrated passive devices (IPD) technology.
3：List of Experimental Equipment and Materials:
GaAs substrate with specific thickness, relative permittivity, and loss tangent; three thick metal (Au) layers; grounding plane; grounding-signal (G-S) pads for probe measurement.
4：Experimental Procedures and Operational Workflow:
The filter's layout is designed in a meandered shape for miniaturization. The design process involves determining the operating frequency range, adding grounding stubs for better out-of-band suppression, and incorporating capacitors for lower band suppression.
5：Data Analysis Methods:
The performance of the filter is evaluated through simulation and measurement, including insertion loss, return loss, and group delay analysis.
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