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A novel, dual-mode planar circularly polarized (CP) antenna with an end-fire radiation beam in parallel with its plane is proposed and numerically investigated. The antenna consists of an aperture and a printed dipole. A pair of stubs are unilaterally loaded along the dipole, and used to generate a dual-mode radiation characteristic. As simulated, it is observed that the impedance bandwidth (20log|S11|...
In this paper, a corrugated substrate integrated waveguide (CSIW) with no metallic vias is proposed, and its propagation characteristics are investigated via our numerical SOC de-embedding method. In our analysis, dominant operating modes in this CSIW at different frequencies are extensively discussed. In final, its complex propagation constant, i.e., phase and attenuation constants, is derived to...
A kind of wideband differential bandpass filters on the multimode slotline resonator has been proposed. In virtue of the hybrid microstrip/slotline structures, the common mode (CM) signals can be intrinsically rejected in the topology. Multiple modes of the slotline resonator are excited to construct the wideband passband in differential-mode (DM). Further, a novel design method has been deduced based...
An impedance-agile microstrip patch antenna loaded with a shorting pin is proposed in this paper. A metallic pin is introduced to short the patch with the ground at a certain location. Thus, electric field beneath the path is perturbed to influence the input impedance. By properly choosing the pin location, the input impedance of the microstrip patch antenna can be adjusted in a wide range without...
Effective wave impedances of substrate integrated waveguide (SIW) with square vias and circular vias are numerically de-embedded from three-dimensional (3-D) full-wave algorithm by virtue of a short-open-load (SOL) calibration approach. Full-wave simulation is at first conducted to model a finite-cell SIW with two feeding uniform waveguides. Afterwards, three calibration standards are established...
This paper presents the fundamental concept and formulation of short-open calibration (SOC) technique in 2.5D method of moments (MoM), and its application in commercial software. By de-embedding the port discontinuities and feeding network, the guided-wave characteristics of periodic planar transmission line structures, such as microstrip line, coplanar-waveguide electromagnetic band-gap, and metamaterial...
A dual-band bandpass filter using a transversal-interference multimode resonator is proposed. The resonator is composed of a flatten ring resonator attached with two open-circuited stubs. By properly selecting the connecting position between the stubs and a ring, the two pairs of resonant modes can be grouped to make up the dual-passband response, and they can be further separated with virtue of two...
A Power MOSFET Idss failure case was studied by SIMS profiling that showed a deeper junction depth between the body/source. TCAD simulation was used to understand the mechanism of the failure.
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