研究目的
To propose a new type of switchable diplexer using switchable impedance matching circuit (SIMC) to connect two quasi-elliptic bandpass filters, featuring compact size, wide passband, high isolation and independently switchable operation states.
研究成果
The proposed switchable diplexer successfully integrates the function of bandpass-response diplexer and the microwave switch, offering advantages such as good return losses, low insertion losses, high isolations, and compact sizes. This makes it attractive for modern radio-frequency front-end applications.
研究不足
The study does not discuss the power handling capability of the switchable diplexer or its performance under varying environmental conditions. Additionally, the practical implementation challenges, such as the integration with other RF components, are not addressed.
1：Experimental Design and Method Selection:
The study employs a switchable impedance matching circuit (SIMC) to connect two quasi-elliptic bandpass filters (QE-BPFs) to constitute a switchable diplexer with four operating states. The SIMC consists of two different T-network phase shifters and a pair of series-parallel configuration p-i-n diode switches.
2：Sample Selection and Data Sources:
The switchable diplexer is fabricated on the substrate Arlon DiClad 880. Simulations and measurements are carried out to verify the design concept.
3：Simulations and measurements are carried out to verify the design concept.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The Skyworks product of SMP1345-079LF p-i-n diode is used, along with Murata capacitors for blocking DC voltages and bypassing the used signals.
4：Experimental Procedures and Operational Workflow:
The design involves optimizing the phase shifts of T-network phase shifters, calculating inductors and capacitors for the T-network, and implementing the inductors and capacitors using high impedance microstrip lines and open circuited radial stubs, respectively.
5：Data Analysis Methods:
The performance of the switchable diplexer is evaluated through simulations and measurements, focusing on insertion losses, return losses, and isolation between ports.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
