We demonstrate a compact, linear, and low loss variation hybrid phase shifter using left-handed (LH) transmission line. For frequencies from 4.3 to 5.6 GHz, this gives nearly linear with voltage, maximum deviation of /spl plusmn/7.5/spl deg/. Within frequency range, the insertion is 3.6 dB, minimum 1.8 dB over continuously adjustable range more than 125/spl deg/, while return only 10.2 dB. Furthermore, requires one control line, it consumes almost no power.

Abstract For 60-GHz band communications, both the mutual coupling and transmission distance restrict performance of a multiple-input multiple-output (MIMO) antenna array. Several studies presented different types meta-materials electromagnetic bandgap (EBG) structures to improve MIMO array at band. In this paper, we four-element patch with EBG for millimeter wave (mmW)communications unlicensed industrial, scientific, medical The single element covered mmW from 57 GHz 63 having dimensions 1.3...

The effects of epitaxial materials and solar cell design on the performance cells grown by multilayer approach are investigated. novel structure with a p-on-n type configuration suggested exhibits improved uniformity in photovoltaic because suppression Zn diffusion. This provides routes to achieve further improvements acts as guideline for commercialization technique.

We introduce active negative-index metamaterials based on left-handed nonlinear transmission line media and measure a greater than 10dB amplification of weak signal wave at the output due to its parametric interaction with an intensive pump wave, by which energy in one frequency is transferred another frequency.

In this paper, we study an energy efficient two-way amplify-and-forward (AF) relay network equipped with multiple antennas at both sources and relay. To minimize the transmit power while satisfying quality of service (QoS) sources, beamformers receive combiners are designed ZF-based processing matrix. Due to non-convexity optimization problem, original problem is decomposed into two simpler problems which can be solved through iteration algorithm. As alternative, eigen-beamforming based...

By employing varactor diodes in a metasurface, the resonance frequency of high-impedance surface (HIS) can be changed by bias voltage. To modulate reflected wave from such surfaces, phase variation more than 360° is required. overcome limitation (< 360°) conventional active we fabricated metasurface with two resonances and manipulated both poles simultaneously to achieve exceeding for smooth modulation reflection frequency. Because this wide phase, it possible broad range frequencies between...

Battery energy storage systems (BESS) has several uses in electrical system such as peak demand control and arbitrage. The benefits of controlling can be viewed both short term long term. In a term, it results lower electric cost subsequent years, also enhances stability contributes to saving this study, we propose novel Real Time Peak Demand Control, which incorporates new time series dimensionality reduction technique dubbed TOU base Piecewise Approximation (TPA) for Dynamic Stochastic...

Abstract We present a compact and broadband balun based on the concept of synthetic left‐handed transmission line right‐handed line.The uses lumped, discrete LC elements only to reduce circuit size dramatically. For frequency range 0.6–1.2 GHz, this maintains 180 ± 9.5° phase difference at outputs, whereas maximum insertion loss is −1.78 dB, minimum return −10.2 dB all three ports, yet merely 12 × 8 mm 2 . As far as we know, smallest reported in literature, can be further reduced, if made...

Abstract Ruddlesden–Popper oxides ( A 2 B O 4 ) have attracted significant attention regarding their potential application in novel electronic and energy devices. However, practical uses of thin films been limited by extended defects such as out‐of‐phase boundaries (OPBs). OPBs disrupt the layered structure , which restricts functionality. are ubiquitous but inhomogeneous interfaces make them difficult to suppress. Here, suppressed using a method control substrate surface termination. To...

We demonstrate a broadband tunable third-order intermodulation distortion (IMD) cancellation architecture using left-handed transmission line (LHTL)-based phase shifter for feedforward amplifier. The fabricated circuit reduces the IMD of main amplifier up to 17 dB after adjusting any frequencies between 1.5 and 2.4 GHz when frequency difference two tones is 2 MHz. In addition, maintains spurious-free dynamic range that greater than 55 dBc at output. This effective method possible because...

A broadband tunable phased array antenna system was fabricated using a and linear phase shifter. For the frequency between 1.6 2.4 GHz, more than ±19° of beam steering achieved with 1 × 4 array. The main part this consists low loss, compact, shifter which is implemented left-handed transmission line theory. same range, showed less 5.1 dB insertion loss for whole 360° variation ±21° deviation from control voltages. By combining quasi-Yagi antenna, fabricated. © 2014 Wiley Periodicals, Inc....

In this paper, we demonstrate a Non-Foster matching method for an electrically small antenna to improve the signal-to-noise ratio (SNR) of communication link. For experiment, used general FM whose resonance frequency is about 52–57 MHz and floating type Linvill negative impedance converter(NIC)-based circuit as element. By implementing cover band, can achieve wide bandwidth covers 40–200 MHz. Our measurement shows 3–7 dB improvement SNR same though there are several spikes which means no in band.

Abstract In this article, we demonstrate a broadband tunable feedforward amplifier design.For any frequency between 1.2 and 3 GHz, the third order intermodulation distortion (IMD) is reduced up to 18dB circuit maintains spurious free dynamic range over 60 dBc at output. This technique utilizes combination of distributed‐element phase shifter (DPS) radio approach achieve wideband linearization. The key element low‐loss, 360° changeable DPS. Because its IMD cancellation capability, proposed...

ABSTRACT In this study, we perform a low‐power wireless power transfer experiment to efficiently energy using phased array antenna (PAA). At the transmitting end, used 4 × PAA consisting of left‐handed transmission line‐based compact phase shifters and inset‐feed microstrip patch antennas. The has −30° 30° tilting beam range with gain ranging from 6.42 7.09 dBi. receiving an 8.9‐dBi single Yagi‐Uda rectenna at distance 0.8 m measured converted DC powers be between 1.5–2.2 mW for range....

Abstract In this article, a high‐frequency arbitrary waveform generator (AWG) based on Fourier synthesis theory is presented. A key element consists of nonlinear transmission line (NLTL) that acts as harmonic for large signals and phase shifter small signals. The harmonics generated by the NLTL are separated into four channels using power dividers each bandpass filtered in channel. amplitude then modulated channel an voltage variable attenuator. Finally, vector from combined Wilkinson...

In this study, we fabricated a low-cost, miniaturized reflectometry system using left-handed nonlinear transmission line (LH-NLTL) and compared its performance with that of commercial vector network analyzer (VNA). the system, used LH-NLTL as frequency translator to replace bulky expensive synthesizer. addition, instead broadband coupler, compact resistive coupler minimize size overall system. To improve accuracy, employed four-port calibration equation. The resulting exhibits highly similar...

This paper proposes a 4×4 broadband phased array antenna using Left-Handed Transmission Line (LHTL) based phase shifter. The is constructed with sixteen quasi-Yagi elements and the shifters, as well four power dividers. A key component of system, LHTL shifter able to control delay incident waves linearly continuously. fabricated operate for frequency range 800 ㎒ (1.6 ㎓~2.4 ㎓). beam scanning ±27° horizontally vertically while gain maintained variation ±1.4 ㏈i.

A band-selective power divider is demonstrated for the first time. By replacing lumped element right-handed (RH) and left-handed (LH) transmission lines (TL) in a conventional Wilkinson divider, it possible to achieve both division filtering simultaneously. utilizing positive phase propagation property of an RHTL, which works as low-pass filter, negative LHTL, high-pass quarter-wave sections required construct are implemented. The fabricated circuit shows insertion loss range 1.7 dB–2.5 dB...

A new laser system to generate the focused Lamb wave using arc array slit is proposed. In this system, spatially expanded Nd:YAG pulse illuminated through on surface of a sample plate same pattern as slit. Then generated at focal point which distance from position dependent curvature . The basic performance proposed method was predicted by simulations and verified experiments. Especially in simulations, effects number width intensity were investigated. results defect-detection experiments...

In this paper, we compared the performances of Right Handed Transmission Line (RHTL) and Left (LHTL) phase shifters as a frequency translator. Unlike other shifters, both show 0°-360° variation for broadband compact in size which are ideal to use For performance comparison, fabricated RHTL LHTL shifter cover 1.5 GHz - 2.4 range with whole 360° variation. range, based translator showed much better whose Spurious Free Dynamic Range (SFDR) is 4dB 17dB higher than when sawtooth modulation...