A UWB dual linear polarized feed for tapered chamber was intensively studied employing 3D FDTD simulation tool. Performance optimized feed in magnitude and phase at the test zone was determined from the previous design. And prototype antenna was built and tested in the presence of the feed section including absorber materials. It had been found that the power drops in low frequency band.
In order to overcome the cut-off at lower frequency band ( < 500 MHz) due to the conical opening section and absorber material, several changes are made during the prototype construction. With a new configuration, launcher is well matched to 100 ohm coaxial cable and aligned to the wall type absorber. Near field probing was also done to verify the magnitude and phase at the aperture of the feed section. Result indicates that the new design have all desired features for taper chamber launcher. It has been mounted at MIT Lincoln Lab test facility.
Field probe data at the near zone (1.5 meter away from the apex) has been collected and showed superior performance to other commercial taper chamber facilities. Result in simulation and measurement from the study will be discussed and presented.
For information about ESL Student Presentations contact Ryan Chilton.
For more information about other ESL Student body events, contact Yakup Bayram.