Akira KAWAKAMI


Waveguide-Type SIS Receiver Using All-NbN Technique
Masanori TAKEDA Yoshinori UZAWA Akira KAWAKAMI Zhen WANG 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/02/01
Vol. E89-C  No. 2  pp. 163-169
Type of Manuscript:  Special Section PAPER (Special Section on Superconducting High-frequency Devices)
Category: 
Keyword: 
SIS mixerNbNsubmillimeter-wavewaveguidenoise temperature
 Summary | Full Text:PDF

Development of Low-Noise Terahertz SIS Mixers with High Current Density NbN/AlN/NbN Tunnel Junctions
Zhen WANG Yoshinori UZAWA Akira KAWAKAMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2000/01/25
Vol. E83-C  No. 1  pp. 27-33
Type of Manuscript:  INVITED PAPER (Special Issue on Superconductive Devices and Systems)
Category: Analog Applications
Keyword: 
NbN/AlN/NbN tunnel junctionultra-high current densityquasi-optical SIS mixerAl/SiO/NbN microstriplinequantum noise limit
 Summary | Full Text:PDF

650-GHz and 1-THz Josephson Array Oscillators Using Shunted Tunnel Junctions with a Small Parasitic Inductance
Akira KAWAKAMI Zhen WANG 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/10/25
Vol. E81-C  No. 10  pp. 1595-1600
Type of Manuscript:  Special Section PAPER (Special Issue on Low- and High-Temperature Superconductive Electron Devices and Their Applications)
Category: Analog Applications
Keyword: 
Josephson arrayparasitic inductanceTHzRLCSJ modelmicrostrip resonator
 Summary | Full Text:PDF

NbN/AIN/NbN Tunnel Junctions Applied as Terahertz SIS Mixers
Zhen WANG Yoshinori UZAWA Akira KAWAKAMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/10/25
Vol. E80-C  No. 10  pp. 1258-1264
Type of Manuscript:  INVITED PAPER (Special Issue on Basic Properties and Applications of Superconductive Electron Devices)
Category: 
Keyword: 
NbN/AlN/NbN junctionhigh current densitySIS mixerterahertz responseheterodyne mixing
 Summary | Full Text:PDF

Josephson Array Oscillators Using Resonant Effects in Shunted Tunnel Junctions
Akira KAWAKAMI Zhen WANG 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/09/25
Vol. E79-C  No. 9  pp. 1242-1246
Type of Manuscript:  Special Section PAPER (Special Issue on Toward Digital and Analog Applications of Superconductors)
Category: Analog applications
Keyword: 
Josephson arrayshunted tunnel junctionRLCSJ modelLCR resonatormicrostrip line
 Summary | Full Text:PDF

Quasi-Optical SIS Mixers with Nb/AIOx/Nb Tunnel Junctions in the 270-GHz Band
Yoshinori UZAWA Akira KAWAKAMI Zhen WANG Takashi NOGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/09/25
Vol. E79-C  No. 9  pp. 1237-1241
Type of Manuscript:  Special Section PAPER (Special Issue on Toward Digital and Analog Applications of Superconductors)
Category: Analog applications
Keyword: 
quasi-optical SIS mixerssubmillimeter wavesubstrate-lens-coupled log-periodic antennamatching circuitinput losses
 Summary | Full Text:PDF

Trends in Secondary Batteries for Portable Electronic Equipment
Kazunobu MATSUMOTO Akira KAWAKAMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/04/25
Vol. E78-C  No. 4  pp. 345-352
Type of Manuscript:  INVITED PAPER (Special Issue on Low-Voltage, Low-Power Integrated Circuits)
Category: 
Keyword: 
secondary batterynickel metal hydride batterylithium ion battery
 Summary | Full Text:PDF