Insertion loss

About: Insertion loss is a research topic. Over the lifetime, 23045 publications have been published within this topic receiving 272553 citations.

A compact third-order 5 GHz bandpass filter with enhanced stopband characteristics in ultra thin organic substrate

Abstract: A lumped-element bandpass filter based on new RXP ultra-thin organic technology with enhanced stopband rejections is proposed in this paper. The design is based on a third-order capacitively-coupled resonator circuit with unique resonator and ground inductor. For demonstration of the proposed circuit and RXP technology, a 5 GHz bandpass filter has been implemented in a four-metal layer 0.191 mm thin RXP substrate. The measured results have a good agreement with the simulation and show that insertion loss is less than 1.24 dB with larger than 1 GHz bandwidth and sharp rejections at both low and high stopband.

Intersubband all-optical limiter based on thermally induced intervalley transfer

Abstract: We propose an all-optical limiter based on the thermally induced intervalley transfer of electrons from Γ-valley states with forbidden normal-incidence intersubband interactions to L-valley states which absorb strongly. Detailed modeling of the device performance in the short-pulse regime (⩽100 ns) yields that the output intensity for a limiter with only 10% insertion loss at low excitation levels will remain clamped over a dynamic range of 25–40.

Decoupling Structures for Millimeter Wave Integrated Circuits in Digital CMOS Processes

Abstract: This brief studies the effect of nonideal decoupling structures on the performance of single-ended circuits operating at the millimeter wave frequency range. Based on a first-order approximation, an upper limit on the impedance of decoupling structures is derived, given a prespecified accepted degradation in insertion loss. To verify the analysis, a 110-GHz single-ended amplifier with a compact decoupling structure based on distributed interdigitized metal-oxide-metal capacitor is implemented. The full-wave electromagnetic simulations of the decoupling structure show an input impedance of (0.47 – j0.12) $\Omega $ at 110 GHz, and the magnitude is less than $1~\Omega $ from 82 to 144 GHz. The degradation in the insertion loss of the matching network is simulated to be less than 0.5-dB compared with the use of ideal decoupling capacitors at 110 GHz. The area of the decoupling structure is $18\times 100 ~\mu \text{m}^{2}$ when implemented in 65-nm digital CMOS process.

SAW Butterworth Contiguous Filters at UHF

Abstract: Abstruct-The design, fabrication, and testing of a set of 16 dualchannel contiguous surface acoustic wave (SAW) Butterworth filters is described. Each filter has a narrow-band (10.15 MHz) and wide-band (20.3 MHz) channel, and center frequencies vary from 248.8 MHz to 401.2 MHz. Theory for determination of finger overlap functions yielding Butterworth frequency responses is given. The SAW substrate used is the minimal diffraction cut of LiTa03 which has excellent bandpass filter properties. In addition to having diffraction suppressed by a factor of 20 over isotropic materials, these properties include superior spurious mode rejection when compared to other popular SAW substrates, and a coupling constant or kZ of 0.0154. An accurate transducer circuit model including parasitic elements is determined to allow optimum choice of matching elements for addressing insertion loss, VSWR, and triple transit suppression design goals. Direct optical projection onto the SAW substrate from 1OX negative masters in combination with the photoresist stripping technique was used for fabrication. Agreement between theory and experiment is good and double detection frequency measurement using SAW Butterworth filters is demonstrated.