H-plane corporate waveguide-fed 4-aperture-stacked circular microstrip patch linear array for Ku band applications

Abstract

and experiment. The measured stopband of the filter was found to be 60 dB up to 44f 0 and 110 dB up to 24f 0 . | S U M M A R YThis letter has described an investigation of a multilayered, multi-conductor stripline resonator, which consists of metaldielectric structure suspended in the middle of a metallic case. All the conductors in the resonator have strong mutual inductive coupling, and hence the previously proposed theory for interdigital microstrip resonator can be incorporated. Increase in the number of the conductors leads to raising the unloaded Q-factor and lowering the resonant frequency; moreover, with tinier interlayers, the effects magnify.A 4-pole passband filter was designed and fabricated, based on the resonator. It was found that, for the central frequency of 360 MHz and 10% fractional bandwidth, the overall size of the filter was only 15.5 3 31.75 3 8.45 mm 3 (0.019k 3 0.038k 3 0.013k). The fabricated filter has upper stopband up to 44f 0 at level 260 dB and 24f 0 at level 2110 dB. AbstractIn this article, a linearly polarized 4-element linear array in Ku band is presented. The single element consists of a circular microstrip patch capacitively coupled to a printed 2216 | MURIEL-BARRADO ET AL.

Mechanically Reconfigurable Linear Phased Array Antenna Based on Single-Block Waveguide Reflective Phase Shifters With Tuning Screws

“…8 (please note that only the H-plane cut is represented since it is the one in which the main-lobe is scanned) along with the simulated results. For the case of θ 0 = 0 ○ the measured radiation pattern is the same that was obtained when measuring the array without the WRPS module [26], which shows that the phase shifters do not introduce a significant disturbance in the behaviour of the antenna. This is in accordance with the scattering parameters measured for a single phase shifter of the WRPS module (shown in Fig.…”

“…The CWFN, introduced in [26], follows an H-plane configuration and has one input and four output ports, all of them in WR51 standard waveguide (a = 12.95 mm, b = 6.48 mm). This device divides the signal at its input port between the four output ports with equal amplitude and phase.…”

“…It must be highlighted that although the use of dielectric parts could be considered as not compatible with aerospace applications, the presented ASPA could be replaced by other radiating structures such as cavity slots at the end of the waveguide outputs [22]. However in the presented prototype this substrate based array has been used since the authors were interested in providing reconfiguration capabilities to the design in [26].…”