A single-diode compact microwave rectifier with a series band-stop structure is presented in this paper. The bandstop connected to the diode block harmonics produced during rectifying. It replaces cascading bandpass or low-pass filter between input and conventional rectifier. at 2.45 GHz an HSMS 282 Schottky realized based on proposed design method. short-ended eighthwavelength microstrip transmission line applied as structure. presents inductive impedance compensate capacitive fundamental...

This paper derives the eigennetworks of radial-waveguide circulators using partial-height ferrite resonators with n=2 Chebyshev characteristics. To obtain a response such junctions it is necessary to establish proper phase angles and admittance levels three device. for but relies on experiments levels. The configurations dealt include standard either half-wave-long open circuited (OC) at both ends or coupled quarter-wave-long OC one end short (SQ) other. It also includes design new single...

The paper gives tuning curves for the counterrotating modes of partial-height ferrite geometries in standard rectangular waveguides. results apply to three commonly used since they are all related by method images. influence image plane or waveguide wall on frequency open dielectric mode is accounted using transverse-resonance techniques. includes experimental single and coupled discs which good agreement with theory.

The paper derives approximate eigennetworks for the demagnetised counterrotating modes of partial-height ferrite-waveguide circulators. susceptance-slope parameter obtained from these is found to be in good agreement with experimental results at S-, X- and J-bands, may therefore used either analysis or synthesis. Since gyrator conductance circulator known once obtained, a knowledge latter variable makes feasible complete description junction. These networks are constructed terms distributed...

A rectenna (rectifying antenna) is usually applied to a microwave power transmission (MPT) system as terminal, which receives (MW) and converts them into DC power. 5.8 GHz aperture-coupled patch antenna array developed with gain of 19.5 dBi, part the rectenna. novel Class-F rectifier series diode proposed achieve high rectifying efficiency based on harmonic termination techniques. The input circuit taken consideration reach condition, while mostly only output involved in conventional...

Microwave-induced thermoacoustic tomography (MITAT) holds significant promise in biomedical applications. It creates images using ultrasonic sensors to detect signals induced by microwaves. The key generating that accurately reflect the fact is achieve sufficient and uniform microwave power absorption of testing target, which closely tied illumination provided antenna. In this article, we introduce a novel design implementation an ultra-wideband water immersion antenna for MITAT system. We...

Voltage doubler rectifiers are usually applied to systems with high voltage and low current requirement. An X band rectifier has been developed 72% conversion efficiency. To the best of our knowledge, obtained rectifying efficiency is maximum reported date at Schottky diodes. The working characteristics diodes in analyzed detail. Closed-form equations diode input impedance presented validated using Advanced Design System simulations. matching network design proposed based on closed-form...

In this paper, designs and implementations of a compact diplexer, broadband balun, tight-coupling directional coupler based on artificial transmission lines are presented. Techniques applying to microwave component explored discussed. All show good performance in their respective groups particularly small circuit sizes at lower frequencies. Those components successfully implemented using conventional design topology. Moreover, feasibility advantages over microstrip various frequencies...

A novel dual-frequency microwave rectifier that operates at 2.45 GHz alone, 5.8 or their combination has been developed in this paper. It is the first approach to rectifying for a situation of incoherent power combination. We focused on two primary components, i.e. regulation impedance matching and recycling second harmonics. quarter-wave short-ended microstrip line shunted input enhance GHz. band-stop filter (BSF) are introduced improve The measured DC (MW-DC) conversion efficiencies 57.5,...

It is well known that some waveguide circulators exhihit an unwanted spurious mode within their passband, which limits insertion loss and bandwidth. This identified as the TE/sub 0,1,delta/ one in case of junction relies on TM/sub 1,1delta,/ for its operation. The influence saturation magnetization separation between two modes studied detail. A suppressor also described decouples coupled without altering frequency circulation ones. consists a thin metal ring placed open face ferrite disks.

Microwave wireless power transmission technology has been applied to several applications with advantages, such as solar satellites, remotely powered vehicles, surveillance platforms, sensors, and radio frequency identification (RFID) tags. The design of a rectifier high MW-DC conversion efficiency is crucial in microwave due its enormous influence the overall system efficiency. Most studies choose schottky diodes rectifying device <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

With the implementation arriving of Internet Things, multi-hop transmission by short-range communication becomes more important than ever before in DTN research areas. The energy efficiency has been received attention researchers due to constrained battery. From earlier research, vast majority consumption is used for neighbors detecting. Duty-cycle strategy an efficient way improve power efficiency, whereas it too simple take advantage contacting opportunities. Therefore, we designed a...

Vehicular communications are widely developed through three types of network structures including vehicle-to-infrastructure (V2I), infrastructure-to-vehicle (I2V) and vehicle-to-vehicle (V2V). The information transmission requirements V2I I2V links needs high capacity V2V vulnerable to the outage cases caused by mobility vehicles. Aim this, we propose a Joint Uplink-Downlink Resource Allocation under Outage Case (RAOC) scheme based on both traceable slow-varying large scale fading...

Microwave-induced thermoacoustic tomography (MITAT) holds significant promise in biomedical applications. It creates images using ultrasonic sensors to detect signals induced by microwaves. The key generating that accurately reflect the fact is achieve sufficient and uniform microwave power absorption of testing target, which closely tied illumination provided antenna. In this article, we introduce a novel design implementation an ultra-wideband water immersion antenna for MITAT system. We...

This paper presents the design and analysis of a compact coplanar waveguide (CPW)-fed zeroth-order resonant (ZOR) antenna with extended bandwidth. Two new frequencies are obtained by adding two stubs between main patch CPW ground. With combination ZOR frequency frequencies, wide bandwidth is achievable increased up to 58.4%. The efficiency higher than 85% in entire band from 3.7 GHz 6.75 GHz. proposed has size 21mm×19mm an omnidirectional radiation pattern, which applicable wireless...

Invent a simulator which provides simulation of heart rate and respiratory to the intelligent sleep monitoring devices based on precision pressure sensors.The was composed control part simulated silicone doll. The doll contains heartbeat breathing airbag. Heartbeat combination signal can be produced according frequency set values. Frequencies were compared with results known accuracy verify simulator. Verified repeatability stability stopwatch.The in ±2 beats per minute times results. better...