A5016627342- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Energy Harvesting in Wireless Networks
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Optimization
- Radio Wave Propagation Studies
- Millimeter-Wave Propagation and Modeling
- Advanced MIMO Systems Optimization
- Superconducting and THz Device Technology
- Electromagnetic Scattering and Analysis
- Electromagnetic Compatibility and Noise Suppression
- Power Line Communications and Noise
- Electromagnetic Simulation and Numerical Methods
- RFID technology advancements
- Electromagnetic Compatibility and Measurements
- Radio Astronomy Observations and Technology
- Advanced Fiber Optic Sensors
- Hormonal Regulation and Hypertension
- Engineering Applied Research
- Renin-Angiotensin System Studies
- Semiconductor Lasers and Optical Devices
- Asthma and respiratory diseases
- Microwave and Dielectric Measurement Techniques
- Renal and Vascular Pathologies
- Bluetooth and Wireless Communication Technologies
WinnMed
2023-2024
Shizuoka University
2021-2024
Mayo Clinic in Arizona
2023
Mayo Clinic Hospital
2023
Tokyo University of Technology
2017-2021
Ehime University
2008-2017
Kyoto University
1978-2017
Kyushu University
1999-2014
Kyushu Sangyo University
2008
Fukuoka Institute of Technology
2008
The ALMA telescope will be an interferometer of 64 antennas, which situated in the Atacama desert Chile. Each antenna have receivers that cover frequencies 30 GHz to 970 GHZ. This frequency range is divided into 10 bands. All these receiver bands are fitted on a cartridge and cooled, with 1 2 at 15K other 8 SIS temperature 4K. band has dual polarization receiver. optics been designed so maximum cooled minimize noise increase receivers. design shown for each Test results method testing near...
A terrestrial microwave power transmission system is considered as an effective method for collecting natural energy. In this system, frequency dependence of the refractive index and multipath propagation due to ground surface poses problems. study, a single-frequency retrodirective was proposed with beam pilot signal using dual-mode dielectric resonator antenna elements. The results confirmed that radiated from entire receiving accurately used same space by simulation. common array element...
A novel spiral antenna that simultaneously radiates circularly and linearly polarized waves is presented. The achieved radiating omnidirectional by shaping a as its looks like cross. Moreover, putting parasitic element close to it, it succeeded in being utilized linear polarization at the same time. This paper explains reason why multi-polarization how designed order utilizing frequencies. Experimental results of return losses, radiation patterns axial ratios prototype are shown for...
A novel circularly and linearly polarized loop antenna is presented. simple configuration, twisted like a cross shape, has achieved radiating wide beam circular polarization simultaneously with linear in two close bands. This configuration brings good to because it uses the transmission line mode of folded dipole antenna. For these reasons, named Cross Spiral Antenna (CSA). In this paper, basic structure principle CSA one port feeding explained. The prototype CSA, which tuned around 1.57GHz...
A novel structure of multi-polarization spiral antennas is presented. The antenna radiates not only linearly polarized waves but also circularly simultaneously without phase shifters. In this paper, the way to tune into three bands, GPS and two mobile phone delineated. return-loss characteristics as regards various lengths appropriate elements that can control utilized frequencies are discussed show be tuned multi-bands. radiation patterns delineated by comparing simulation results...
The mechanism of activation inactive renin was studied in normal human plasma. molecular weight active and those before after were analyzed by sephadex gel filtration. Active plasma had a 48,000 +/- 1000. Trypsin treatment cold activated 54,000 apparently did not change its activation. "Cryoactivation" possible only when whole used. When the fractionated filtration, cryoactivation observed any fractions. Cryoactivation requires certain factor(s) contained some Plasma kallikrein is likely to...
In this paper a single layer planar antenna, which simultaneously radiates circularly polarized waves and linearly at two different frequencies for the mobile phone ISM bands, is presented. Software simulations of proposed design associated measurements are reported as well. The presented antenna has following features: (a) it single-layer electrically small (b) by means feeding port without need phase shifter, (c) omni-directional. shown in can be easily applied to printed boards, makes...
A novel feeding way for balanced feed antennas is presented. To construct the antenna, a cross shape loop/spiral antenna (CSA)—a CP invented by author—needs to be fed through well-balanced port. poor current balance will bring serious deterioration in radiation. In addition, of general ports not adequate. For these reasons, feeder reducing influence an unbalanced should suggested. this paper, dipole employed as CSA. S11 characteristics and radiation patterns obtained being coaxial cable (an...
Various facets of activation inactive renin by acidification or cold exposure were investigated in normal human plasma. The acid obtained titration was usually less than that dialysis method, but varied from 41% to 122% the latter. phase accounted for about 70% total achieved combined effects and alkaline phases on average, not affected any inhibitors serine, thiol carboxyl protease, whereas serine protease suppressed both plasma kallikrein activation. A different mode suggested some...
Abstract This paper aims to introduce two types of submillimeter-wave horn antennae designed by the authors and present numerical findings obtained an evaluative testing system that has also been developed authors. Submillimeter-wave components are widely used in radio-astronomical observation systems. There is a need minimize (1) various losses possibly incurred wave-receiving unit, (2) quantity unwanted electromagnetic waves mixing in. It well-known fact corrugated antenna possesses very...
A novel structure for a circular polarized spiral antenna is presented. The radiates waves with only one port even though the very simple. designed based on cross shaped loop antenna, CSA, which invented by author. CSA has begun to radiate polarization, changing some length of elements. In this paper, that tuned into GPS band delineated. return-loss characteristics and radiation pattern prototype show good circularly 3dB or less axial ratios.
A novel planer antenna which radiates dual polarized waves at two frequencies is presented in this paper. combination of a dipole and spiral gave the that circularly GPS band, 1.5 GHz, linear an ISM 2.45 GHz. The most attractive points are its structure single layer, fed by only one port, it does not need any phase-shifters for radiating waves. performances have been improved compared with our conventional layered polarization antenna. Simulation results return loss, radiation patterns axial...
A retro-directive system with beam pilot signal is proposed in order to solve the multi-path propagation problem microwave power transmission along horizontal direction. In this system, a beamed radiating from entire surface of receiving antenna. It shown that high efficiency can be maintained even gradient refractive index by inverting phase signal.
A double-band circularly polarized (CP) antenna for a novel radio-frequency identification (RFID) system using wireless power transmission (WPT) technology is presented. Although the presented thin lightweight circular microstrip patch with one port, it radiates wide beam CP waves at two RFID frequency bands, 920 MHz and 2.45 GHz. Therefore, can be applied not only to but also new being booted up by WPT energy.
This paper introduce the two types of submillimeter-wave horn antennae designed by authors and present experimental results obtained an evaluative testing system that has also been developed authors. Submillimeter-wave components are widely used in radio-astronomical observation apparatuses. It should be noted, however, that, because submillimeter-waves radiating from astronomical objects extremely weak, there is a need to minimize (1) various losses possibly occurred wave-receiving unit...
1. The mechanism of increased renin activity after human plasma had been kept at -5 degrees C for 4 days (cryoactivation) was investigated. 2. increase in by cryoactivation closely correlated to the obtained incubation with trypsin (r = 0.88, P less than 0.001, n 10). 3. An inhibitor thiol enzyme, N-ethylmaleimide did not inhibit cryoactivation. 4. Soyabean and di-isopropylflurophosphate (DFP) inhibited cryoactivation, suggesting that may be due action a trypsin-like serine enzyme. 5. In an...
The results of an analysis the effects wall shapes on electromagnetic waves propagating around walls buildings are presented. Analyzing through space where exist is very important these days in that mobile or wireless communication inside have become widespread. Furthermore, analyses which so far been conducted not considering now show necessity walls. also use different will make it possible to control inside/outside rooms.
A novel wideband omnidirectional circularly polarized (CP) antenna is presented. The constituted by spiral radiators and a dipole feeder. To configure the in cross shape leads not only radiations but also polarization. Combining with feeder, presented achieves CP as keeping good S11 characteristics. configuration simulated characteristics of are Simulation results show that achieve -8 dB impedance bandwidth 12.5% 4 axial ratio (AR) 20% boresight direction. At 3.66 GHz, maximum gain 4.4 dBi...
In rats made hypertensive by clipping a renal artery or subcutaneous renin injections, removal of the clipped kidney cessation administration were followed an abrupt fall in arterial pressure, which stabilized at level higher than control value. This was associated with healing mesenteric arteritis, while hyaline lesions remained unaffected. The functional and pathologic changes caused clip prevented renin. These experiments provide additional evidence that renin-induced hypertension may...