X-band RF switch implementation in substrate integrated waveguide

Erdöl, Tuncay
An RF switch in substrate integrated waveguide (SIW) technology for X-band is designed and demonstrated. Design is based on embedding shunt pin diodes of the switch in an evanescent mode waveguide filter. At reverse bias, pin diodes formed a part of filter's capacitances. Thus switch also functions as a filter when it is in “on” state. At forward bias of diodes, capacitances of the filter are short circuited to obtain a good isolation. The same circuit structure is used to design a tunable filter and an RF power limiter which also functions as a filter. Several RF functions usually used in RF frontends (power limiting, filtering, switching) are combined in a single circuit which helps miniaturization of the frontend. The circuit can be produced with standard PCB and chip&wire technology. The circuits developed have comparable performances with microstrip counterparts and they are advantageous to use in microwave systems using SIW as the basic transmission medium and need filtering functionality.


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Substrate integrated waveguide unequal power divider with adjustable dividing ratio
Mohammadi, P.; Demir, Şimşek (2014-01-01)
An unequal power divider with substrate integrated waveguide technology has been designed. This structure is compact in size and has the capacity to develop to the n-port unequal power divider. Its output powers ratio is also adjustable. The output powers can be easily change by varying the width of the output ports. The design procedure has been done analytically. Then a two-way unequal SIW power divider is designed. Simulation results of the proposed structure shows that return loss is below than10dB from...
Citation Formats
T. Erdöl, “X-band RF switch implementation in substrate integrated waveguide,” Ph.D. - Doctoral Program, Middle East Technical University, 2012.