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A novel stacked‐defected ground structure (SDGS) for ultra‐wideband and low‐loss balun design was developed. The balun implements an inductive compensation method on a multilayer liquid crystal polymer (LCP) substrate to control phase and amplitude imbalances. Based on a 15‐dB input return loss and 0.5 dB insertion loss criterions, the balun has a measured bandwidth from 70 MHz to more than 2.1 GHz,...
This paper develops a real-time automated fault detection interface and set-up for a multichannel bandwidth-limited system. This interface integrates both time domain reflectometry (TDR) and time domain transform (TDT) gating techniques which are combined with a signal analysis algorithm. Using a database of signal responses, the interface software can identify, locate and visualize positions of open,...
We present the design and fabrication of Helical circular coils for an inductive power transfer (IPT) system through a sealed metal container. By co-axially aligning a pair of the Helical coils, the wireless IPT channel is formed for energy transfer without any physical penetrations. Power measurement results demonstrate that the helical coil-IPT system achieves a measured power efïîciency of ∼4 %...
The paper presents a compact coplanar waveguide (CPW)-fed ultra-wideband (UWB) printed antenna with a dual band rejection. Implemented with developed fractal structures-based Koch shape, the proposed antenna uses a complementary split ring resonator (CSRR) etched into a single layer to obtain the dual band-notched function. Also integrated with a new feeding method, four different antenna designs...
We present the design and fabrication of an ultra-wide bandwidth balun on a multilayer organic Liquid Crystal Polymer substrate. Using a novel U-shaped defected ground structure and a single inductor, the balun achieves a measured insertion loss of less than 1dB and return loss of better than 10dB from 50MHz to more than 3 GHz. Within the measured 46⋆1 bandwidth ratio from 50MHz to 2.3GHz, the amplitude...
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