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In this paper, a multi-layer modified circular ring absorber is introduced on the basis of the ordinary circular ring. Simulations results are shown that the absorptivity is more than 90% in the frequency range from 5.5GHz to 19GHz under the normal incidence, the bandwidth is achieved up 13.5GHz, covering C, X, and Ku bands. The FSS structure exhibits the stable response for both TE and TM polarizations...
A 32Gb/s-NRZ, 15GBaud/s-PAM4 configurable DFB Laser Diode Driver (LDD) is presented in standard 65nm CMOS. The driver employs a balanced-input, single-ended-output topology to deliver large current output, and integrates a tunable pre-emphasis to extend the bandwidth. An on-chip active back-termination (ABT) is proposed which absorbs loading reflections without sacrificing the effective modulation...
Photos crowdsourced from mobile devices can be used in many applications such as disaster recovery to obtain information about a target area. However, such applications often have resource constraints in terms of bandwidth, storage, and processing capability, which limit the number of photos that can be crowdsourced. Thus, it is a challenge to use the limited resources to crowdsource photos that best...
A current probe based on IEC standard 61967-4 is proposed to investigate the conducted electromagnetic emission of IC above 1 GHz. The 1 Ω method in direct coupling method is revisited, and the concern for extending frequency range is discussed. The critical resistive network of 1 Ω probe is realized by a semiconductor process instead of the SMD resistors. With the advantage of reduced parasitic effect,...
The paper presents a novel uniplanar integrated filtering dipole with a second-order filtering response of enhanced frequency selectivity. The first stage of the filter is a U-shaped half-wavelength resonator, whereas the second one is the planar dipole antenna. The bandwidth of the dipole is controlled by the edge coupling between the two stages. The U-shape resonator also acts as a balun. A truncated...
A method of designing a patch antenna with wideband and filtering characteristics is proposed in this paper. Different from traditional aperture-coupled patch antenna, a stub loaded resonator (SLR) is employed as the feed. This coupled SLR-patch produces three reflection zeros (dual-mode from the SLR and one from the patch) and therefore a wider bandwidth. Due to the resonant property of the SLR,...
Photo crowdsourcing with smartphone has attracted considerable attention recently due to the prevalence of smartphones and the rich information provided by photos. In scenarios such as disaster recovery or battlefield, where the cellular network is partly damaged or severely overloaded, Disruption Tolerant Networks (DTNs) become the best way to deliver the crowdsourced photos. Since the bandwidth...
A novel third-order band-pass frequency selective surface (FSS) is proposed in this paper. This FSS has a good filtering performance at 16–18GHz in the terms of band-pass flatness and steep-cutoff characteristic by using multi-layer surfaces cascade coupling each other. The FSS is comprised by three patch surfaces and two aperture surfaces with the total thickness of only 2mm (1/9 λ) and has a −1dB...
A miniaturized printed antenna with dual inductor-loaded monopoles is proposed in this paper. The two monopoles contribute two adjacent resonances, which result in a broadband performance of the antenna. Each monopole is embedded with a chip inductor. The inductors introduce large inductance, which greatly decrease the resonant frequencies of the monopoles. Some important parameters are studied for...
In this paper, a miniaturized planar antenna with enhanced bandwidth is designed for the ISM 433 MHz applications. The antenna is realized by cascading two resonant structures with meander lines, thus introducing two different radiating branches to realize two neighboring resonant frequencies. The techniques of shorting pin and novel ground plane are adopted for bandwidth enhancement. Combined with...
Two novel active frequency selective surfaces (AFSS) are proposed in this paper. Long Term Evolution (LTE)-AFSS and WiFi-AFSS are made up of square loop patch and half circular loop patch for shielding 2.1GHz and 2.45GHz signals respectively. PIN diodes inside AFSSs are used to realize the switching between transmission and reflection characteristics. In addition, both AFSSs have large holes for the...
In this paper, a mmWave unified access and back-haul (UAB) network is presented, where both radio access (RA) and backhaul (BH) share the same millimeter wave bands. Considering uniform resource allocation of RA and BH radio resource for all pico stations, which can well mitigate the interference among pico stations, the capacity of UAB is mainly influenced by the allocated resource ratio between...
Fingerprint minutiae distribution plays a critical role in studies such as fingerprint individuality for strengthening the scientific validity of fingerprint evidence and generating synthetic fingerprints for large-scale system evaluations. Fingerprint minutiae are not uniformly distributed as once assumed. Spatial inhomogeneity has been found in minutiae distribution, yet it is not clear what underlies...
Current-mode control is commonly used in buck converters. Many current-mode buck converters with variable-frequency controllers have been published for smaller inductance and maintaining efficiency via fast and slow frequency, respectively. However, bandwidth of the current-mode buck converter with fixed compensation coefficients is limited by the lowest switching frequency, thus decreases transient...
A new UWB tightly coupled antenna array is presented. In traditional antenna design, the distance between array elements is considered carefully to reduce mutual coupling effect, however coupling is not only desired but also enhanced and adjusted to increase array bandwidth in this new array. The equivalent circuit model of dipole array above a ground plane is discussed and its input impedance is...
A current-mode mm-wave direct-conversion receiver breaking trade-offs among bandwidth, NF and linearity is designed and realized in 65nm CMOS. The 60GHz receiver employs novel Frequency-staggered Series Resonance Common Source (FSRCS) stage to extend RF bandwidth with superior noise performance. The receiver's current-mode operation offers excellent out-of-band blocker tolerance and linearity. With...
To bridge the widening gap between computation requirements and communication efficiency faced by many-core chips, Wireless Network-on-Chip (WiNoC) has been proposed by using ultra-wideband interconnect. While prior research has demonstrated the salient features of WiNoC as high perlink data rate, high accumulated bandwidth, high flexibility, low overhead and low power consumption, this research aims...
This paper presents a frequency-agile bandpass filter with constant absolute bandwidth and high linearity. The proposed resonator is composed of an open-ended transmission line with back-to-back varactor diodes loaded at one end. A novel mixed electric and magnetic coupling scheme is proposed to contorll the coupling coefficients in order to keep the bandwidth constant when the frequency is tuned...
This paper presents SHARP: a scalable framework for Dynamic Joint Replica Placement and Request Routing (DJRPRR) scheduling in content delivery networks. After grouping similar proxies and modeling them by a single section, we propose a hierarchical scheduling framework to greatly reduce the dimensions of the mathematical formulation. In every phase the obtained shaped formulation has an easy-solvable...
Currently, combining turbo or low-density paritycheck (LDPC) codes with bit-interleaved coded modulation (BICM) is the most common coding scheme for bandwidthlimited channels. However, in order to be capacity achieving, shaping is necessary, which is difficult in conjunction with iterative processing. An alternative is interleave-division multiplexing (IDM), which can be either treated as a coded...
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