Frequency Reconfigurable Antenna Based on Substrate Integrated Waveguide for S-Band and C-Band Applications

Frequency Reconfigurable Antenna Based on Substrate Integrated Waveguide for S-Band and C-Band Applications

Blog Article

A novel frequency reconfigurable antenna based on substrate integrated waveguide (SIW) for S-band and C-band applications is proposed.The antenna employs a SIW resonant cavity structure with a rectangular-ring slot and a long slit etched on the top surface.An extra via post is introduced to adjust the resonance frequency Egg Poachers of the low-frequency mode independently without affecting the impedance matching of the high-frequency mode or decreasing the gain.

Several PIN diodes are symmetrically placed along the rectangular-ring slot to attach the patch to the top surface.The working state of PIN diodes is controlled by a simplified Retro Collection bias structure.A prototype was fabricated and measurements show the proposed antenna has a bandwidth of 18 MHz in S-band low-frequency mode and 322 MHz in C-band high-frequency mode.

Good agreements between the simulated and measured return losses, as well as radiation patterns, are observed.