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In this paper, a kind of Ka-band Planar broadband slot-coupled antenna is introduced. In order to broaden the bandwidth, use E-shaped patch on the basis of the copper axial feed antenna. These two parallel slots is equivalent to two LC resonant circuits which has coupling effects. Meanwhile, slot on the ground. Through the simulation, the center frequency of the antenna is 29 GHZ and its relative...
This paper uses HFSS (High Frequency Structure Simulator) by Ansoft Crop. to simulate an iris filter with center frequency of 110GHz and with relative bandwidth of 10%. The simulation results show that the center frequency is 109.74GHz and the 3dB bandwidth is 10.01%. Over the entire passband, the return loss is better than 13.56dB. The filter presents a steep cutoff, the insertion loss at the frequency...
As the demand for data consumption increasingly grows, the current wireless systems in microwave frequency region are not able to provide sufficient bandwidth for the future need of communication capacity. Therefore, the availability of vast bandwidth in terahertz (THz) and sub-THz (100 GHz – 10 THz) becomes a major advantage to exploit for wireless communication. In this paper, a transmission experiment...
The letter presents a fourth-harmonic mixer based on planar schottky diode working at 330–500GHz. The result of simulation predicts that conversion loses well below 14dB from 369GHz to 477GHz with 6 dBm of local oscillator power. Therefore, the good performance of mixers in wide bandwidth and low conversion loss provides designers with a better choice.
An analog-to-information converter (AIC) enables information quantization instead of signal quantization, which can reduce both quantization efforts and data bandwidth. Therefore, an AIC will relax data processing and transmission burden and improve overall power efficiency, making it attractive for wireless vision sensor networks. In this paper, we propose a background subtraction based column-parallel...
Multilevel modulation formats, such as PAM-4, have been introduced in recent years for next generation wireline communication systems for more efficient use of the available link bandwidth. High-speed ADCs with digital signal processing (DSP) can provide robust performance for such systems to compensate for the severe channel impairment as the data rate continues to increase.
At data rates beyond 10Gb/s, most wireline links employ NRZ signaling. Serial NRZ links as high as 56Gb/s and 60Gb/s have been reported [1]. Nevertheless, as the rate increases, the constraints imposed by the channel, package, and die become more severe and do not benefit from process scaling in the same fashion that circuit design does. Reflections from impedance discontinuities in the PCB and package...
We investigate the signal-LO frequency offset tolerance of PM-QPSK under tight filtering using all-digital compensation. For frequency offsets of 0.32× symbol rate, the additional receiver electrical bandwidth can be as low as 0.13× symbol rate.
This paper presents a wide-band analog Fractional-N clock synthesizer operating from 8 to 12.4GHz suited for data communication standards. The synthesizer generates a low noise clock with rms jitter of 288–460fs, yet maintains wide loop bandwidth from 1.5 to 4.3MHz. The design consumes 16.9mW from a 1V supply, while occupying an area of 0.39mm2 in a 40nm CMOS technology.
Multiview video refers to the simultaneous capturing of multiple video views with an array of closely spaced cameras. In an interactive multiview video streaming (IMVS) system, a client can play back the content in time in a single view, and may observe a scene of interest by switching to different viewpoints. Users independently choose their own view navigation paths through the high-dimensional...
A current-efficent, fully integrated low-dropout regulator(LDO) with improved load transient responses for system-on-chips(SoC) is presented in this paper. It makes use of high bandwidth common-gate amplifier and slew-rate enhancement circuit(SRE) triggered by voltage spikes to improve output voltage spike and response time of the LDO greatly. The proposed circuit has been implemented in a 0.35µm...
The terahertz (THz) region of the electromagnetic spectrum, spanning from 100 GHz through 10 THz, become more and more import for a wide range scientific, military and commercial applications day by day. This paper presents a design of novel waveguide to suspended microstrip probe transition at terahertz atmospheric window 220GHz using sector step impedance matching circuit by Advanced Design System...
An equivalent circuit model of improved electric resonant structure loaded by lumped components is presented in this paper. The relative resonant characteristics are detailed analyzed and the main factors effected on the bandwidth of transition from zero to pole transmission points are retrieved. An commercial simulation software of Ansoft HFSS is used to validate our theoretical analysis. Then, a...
We review recent trends and progress in 100G module development for long haul DWDM applications. Special attention is paid to properties enabling seamless upgrade of existing long haul transmission systems.
We experimentally demonstrate penalty-free transmission of 127-Gb/s coherent PM-QPSK through a cascade of ten commercial 50-GHz WSS over 1500-km NDSF. Simulation results show that cascades of 40 such 50-GHz liquid-crystal based ROADMs is feasible.
We review recent trends and progress in 100 G module and subsystem development for long haul DWDM applications and explore similarities and differences between these 100 G products and those developed at 40 G.
We investigate the feasibility of ADC sampling rate below 2x versus optical/electrical bandwidths in 100 G-PM-QPSK coherent receivers. We find <0.5 dB penalty for rates down to 5/4x even for dispersion as high as 24,000 ps/nm.
Operation of a gyro-TWT amplifier with helical interaction waveguide is investigated by means of nonlinear self-consistent code. Simulation results are in good agreement with reported experimental observation. Reduced sensitivity to the electronspsila velocity spread and broad bandwidth of this type of gyro-device are demonstrated.
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