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This paper addresses an ultra-compact (2.8 cm2) and wide bandwidth rectenna operating in the extended Ku-band. Experimental results demonstrate that the proposed rectenna can harvest a DC power ranging from 0.125 mW to 1.43 mW for frequencies between 14.5 GHz to 19.5 GHz and for resistive loads between 250 Ω and 4 kΩ. A maximum conversion efficiency of 55.3 % is obtained at 16.05 GHz for an incident...
This paper describes the use of microfluidic microwave sensors for measuring the length, volume, speed and dielectric properties of different liquids in a segmented flow. The sensor is a variant of the split ring resonator, operating around 4 GHz, realized in a microstrip implementation. Changes of the resonant frequency and quality factor are performed when a segment enters the sensing region, in...
This paper theoretically presents TM electromagnetic plane wave scattering characteristics of an optically controlled subwavelength slot grating with an electrically small period on a dielectric slab. It is theoretically disscussed about how the resonance property of the subwavelength slot grating could be controlled using photoinduced plasma, changing the thickness of the slots, for application of...
Linearizing power amplifiers (PA) using digital pre-distortion (DPD) results in the use of a pre-distorted driving input signal that exhibits higher peak-to-average power ratio (PAPR). This results in a decrease in the PA efficiency which is dependent on the level of output power back-off required. This work proposes a new linearization architecture based on a new “post-distortion” method for power...
This paper describes the design and characterization of a reflective-type phase shifter for ISM-Band applications. The center frequency of the proposed phase shifter is in the high millimeter-wave frequency range at 250 GHz. On-wafer measurements showed a relative phase shift of 170° at the center frequency. An absolute bandwidth of 10GHz is observed, in which the phase shifter shows only little gain...
A CMOS wideband dielectric spectroscopy system is proposed for chemical and biological material characterization. The complex permittivity detection is performed using a configurable harmonic-rejecting receiver capable of indirectly measuring the complex admittance of sensing capacitor exposed to the material-under-test (MUT) and subject to RF signal excitation with a frequency range of 0.62–10GHz...
We report on the development of a 0.15µm gate length InAlN/GaN HEMT on SiC substrate technology for applications in K and Ka-Bands. Measurements results of pulsed I–V, S-parameters, load-pull and RF noise figure are presented. Devices exhibit a maximum DC transconductance of 350mS/mm and Idss of 0.95A/mm. Cut-off frequencies FT and Fmag of 45GHz and 100 GHz are reached. Load-pull power measurements...
An effective decoupling scheme to reduce the mutual couplings between radiating elements in an isosceles triangular three-element antenna array is proposed in this paper. It is shown from the network point of view that one dummy element with reactive load is sufficient to decouple a compact array with two different mutual couplings. Having had decoupled, each radiating element can be independently...
This paper, for the first time, presents the characterization of a very wide-band flip-chip interconnect from DC to 170 GHz on a liquid crystal polymer substrate. The performance is optimized by modeling the structure in a 3-D electromagnetic simulation software. To mitigate the influence of the capacitive effect caused by the flip-chip overlap section, high impedance inductive sections are used....
This paper presents, for the first time, a tunable microstrip microfluidic bandpass filter, with a center frequency of 1 GHz, on liquid crystal polymer (LCP). A 60 mil cavity, initially filled with distilled (DI) water (εr = 80), is placed below a 2 mil LCP layer. Based on this multilayer structure, the dimensions of microstrip lines are determined. In order to tune the filter center frequency, DI...
In 1999, Prof. Oliner, assisted by Prof. Linda Katehi, Prof. Madhu Gupta and myself, worked to counteract the growing usage of the term “PBG” (Photonic Band Gap) to describe perioidic arrays (including filters and other components) displaying conventional passband and stopband characteristics. Arthur was insistent that inventing new terminology was no substitute for inventing new devices or concepts...
A new compact tunable microstrip diplexer based on varactor-tuned dual-mode stub-loaded resonators is investigated. By using the dual coupling paths, the two channel filters can then be designed independently. In addition, by properly varying the dc bias voltages applied to the varactors loaded onto the dual-mode resonators, the passband frequencies of the diplexer can be changed over a wide tuning...
In practical implementations, class-F amplification is achieved based upon the second and/or third harmonic control provided by the output matching network. This paper presents a design method based upon inserting finite-frequency transmission zeros to a lumped-element matching network at the harmonic frequencies of interest. A two-section impedance matching network is transformed to either a class-F...
This paper presents a dielectric-ribbon based data-link which offers both multi-cast network capability (single transmitter broadcasting to multiple receivers) and robustness as it does not rely on electrical contact to support interconnection. The link was developed specifically for aircraft & spacecraft applications where interconnect reliability and lightweight cabling is more critical than...
This paper is focused on the automated synthesis of wideband bandpass filters by means of aggressive space mapping (ASM). The considered filters are microstrip filters implemented through a combination of shunt connected stepped impedance resonators (SIRs) and grounded stubs coupled through impedance inverters. By virtue of the transmission zeros introduced by the shunt connected SIRs, the filters...
A novel method to fabricate substrate-less flexible and printable electronics for microwave and millimeter-wave applications is presented. InGaAs MHEMT technology is utilized in this work to demonstrate feasibility of the flexible electronics with bulk limited performance at microwave frequencies for the first time. The fabrication process and measurement results are discussed in detail.
To combine large number of CMOS power transistors within compact area, a 2D distributed in-phase power combiner is proposed with use of metamaterial-based zero-phase-shifter. One 54 to 62.8GHz PA has been demonstrated in 65nm CMOS with a 4×4 distributed power combining of 16 transistors in compact area of 0.48mm2. Measured results show 16.6dBm output power (OP1dB), 11.3% peak PAE, 95.2mW/mm2 output...
Intel Labs is a research arm at Intel focused on delivering innovations to fuel Intel's growth and technology leadership. Intel Labs Mexico, one of the research groups of Intel Labs globally, has been leading research and technology development in Mexico and Latin America since its creation in 2005. This paper provides an overview of the main research areas at Intel Labs Mexico as well as the corresponding...
This paper reviews different wireless local positioning principles and explains the interaction between local positioning and the Internet of Things (IOT). The principle, performance and use of recent local positioning systems in the context of the IOT are shown in detail for typical applications. The first application is the accurate real-time localization of transportation vehicles using local positioning...
The last seven years, Cinvestav-GDL and CICESE, two of the most important research centers in Mexico, have been working together in several microwave research topics. This paper describes the relationship of these two academic institutions regarding to the research activities in this field. A brief history and the research interests of these institutions are presented, highlighting some of the benefits...
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