start-ver=1.4
cd-journal=joma
no-vol=1
cd-vols=
no-issue=
article-no=
start-page=44
end-page=47
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1999
dt-pub=199912
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Single and multiple Gunn diode oscillator using an image NRD guide
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A single and a multiple Gunn diode oscillator using an image NRD guide have been investigated. The LSM01 mode which is the operating mode of the image NRD guide can be the dominant mode because undesired modes are suppressed due to existence of the image plane. In experiments at X-band for oscillators with Gunn diodes mounted in the dielectric strip of the image NRD guide, the oscillation frequencies could be varied by a movable shorting plane for the single diode case and an effective power combining operation was obtained for the double diode case
en-copyright=
kn-copyright=

en-aut-name=SanagiMinoru
en-aut-sei=Sanagi
en-aut-mei=Minoru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=WatanabeMasataka
en-aut-sei=Watanabe
en-aut-mei=Masataka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NogiShigeji
en-aut-sei=Nogi
en-aut-mei=Shigeji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama University

affil-num=2
en-affil=
kn-affil=Okayama University

affil-num=3
en-affil=
kn-affil=Okayama University
en-keyword=Gunn diodes
kn-keyword=Gunn diodes
en-keyword=Gunn oscillators
kn-keyword=Gunn oscillators
en-keyword=microwave oscillators
kn-keyword=microwave oscillators
en-keyword=nonradiative dielectric waveguides
kn-keyword=nonradiative dielectric waveguides
en-keyword=variable-frequency oscillators
kn-keyword=variable-frequency oscillators
END

start-ver=1.4
cd-journal=joma
no-vol=3
cd-vols=
no-issue=
article-no=
start-page=1259
end-page=1262
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1996
dt-pub=19966
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Axially symmetric Fabry-Perot power combiner with active devices mounted on both the mirrors
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We investigate an axially symmetrical Fabry-Perot power combiner with many more active devices operating in axially symmetric TEM01n mode, which has an excellent feature of uniform device-field coupling required for high power combining efficiency. By numerical calculation using the boundary element method, it was shown that high combining efficiency can be obtained when a circular groove of larger radius is installed on either the plane mirror or the concave mirror. In experiments at X-band, almost perfect power combining of twenty or twenty-four Gunn diode oscillators mounted on both of the mirrors was achieved
en-copyright=
kn-copyright=

en-aut-name=SanagiMinoru
en-aut-sei=Sanagi
en-aut-mei=Minoru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=YamamotoEiji
en-aut-sei=Yamamoto
en-aut-mei=Eiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NogiShigeji
en-aut-sei=Nogi
en-aut-mei=Shigeji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama University

affil-num=2
en-affil=
kn-affil=Okayama University

affil-num=3
en-affil=
kn-affil=Okayama University
en-keyword=Fabry-Perot resonators
kn-keyword=Fabry-Perot resonators
en-keyword=Gunn oscillators
kn-keyword=Gunn oscillators
en-keyword=boundary-elements methods
kn-keyword=boundary-elements methods
en-keyword=microwave oscillators
kn-keyword=microwave oscillators
en-keyword=mirrors
kn-keyword=mirrors
en-keyword=power combiners
kn-keyword=power combiners
END

start-ver=1.4
cd-journal=joma
no-vol=1
cd-vols=
no-issue=
article-no=
start-page=
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2001
dt-pub=200112
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Traveling-wave power divider with coplanar waveguide probes inserted into rectangular waveguide
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A new traveling-wave power divider with coplanar waveguide probes is investigated. The divider is constructed by connecting successively the dividing units which consist of coplanar waveguide probe-pairs inserted into a rectangular waveguide and the thin narrow section. From experiments on fourand six-way dividers, wideband characteristics comparable to a divider with coaxial probes is demonstrated
en-copyright=
kn-copyright=

en-aut-name=SanagiMinoru
en-aut-sei=Sanagi
en-aut-mei=Minoru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=OmoriRyouhei
en-aut-sei=Omori
en-aut-mei=Ryouhei
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NogiShigeji
en-aut-sei=Nogi
en-aut-mei=Shigeji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama University

affil-num=2
en-affil=
kn-affil=Okayama  University

affil-num=3
en-affil=
kn-affil=Okayama University
en-keyword=coplanar waveguide components
kn-keyword=coplanar waveguide components
en-keyword=power dividers
kn-keyword=power dividers
en-keyword=rectangular waveguides
kn-keyword=rectangular waveguides
END

start-ver=1.4
cd-journal=joma
no-vol=1
cd-vols=
no-issue=
article-no=
start-page=337
end-page=340
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1997
dt-pub=199712
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Axially symmetrical Fabry-Perot oscillator with multiple devices inserted in dielectric substrate
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We investigate an axially symmetrical Fabry-Perot oscillator with active devices inserted in a dielectric substrate for power combining of many more devices in the microwave and millimeter wave frequency range. Empirically in this oscillator, efficient power combining can be done when it oscillates approximately at the frequency which corresponds to the wavelength equal to twice the spacing between the devices. The wavelength in the dielectric is shorter than in free space, so we tried to insert the devices in the dielectric substrate in order to increase the number of devices. By measuring the oscillation frequency of the oscillator with sixteen devices at X-band, we confirmed that the spacing between devices was about a half wavelength in the dielectric. We achieved almost perfect power combining of sixteen devices
en-copyright=
kn-copyright=

en-aut-name=SanagiMinoru
en-aut-sei=Sanagi
en-aut-mei=Minoru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=ItogaToshihide
en-aut-sei=Itoga
en-aut-mei=Toshihide
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NogiShigeji
en-aut-sei=Nogi
en-aut-mei=Shigeji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama University

affil-num=2
en-affil=
kn-affil=Okayama University

affil-num=3
en-affil=
kn-affil=Okayama University
en-keyword=Fabry-Perot resonators
kn-keyword=Fabry-Perot resonators
en-keyword=Gunn oscillators
kn-keyword=Gunn oscillators
en-keyword=microwave oscillators
kn-keyword=microwave oscillators
en-keyword=millimetre wave oscillators
kn-keyword=millimetre wave oscillators
en-keyword=power combiners
kn-keyword=power combiners
END

start-ver=1.4
cd-journal=joma
no-vol=
cd-vols=
no-issue=
article-no=
start-page=229
end-page=232
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2000
dt-pub=200012
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Hyper NRD guide oscillator with Gunn diodes mounted in the dielectric strip
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Hyper NRD guide oscillators mounted with a single and multiple Gunn diodes have been investigated. The operating mode of the hyper NRD guide can be lower order by optimizing the structure of the guide. The Gunn diodes were arranged in the dielectric strip of the guide. In experiments at X-band, the oscillation frequencies could be varied by a movable shorting plane for the single diode case and an almost perfect power combining was obtained for the double diode case
en-copyright=
kn-copyright=

en-aut-name=SanagiMinoru
en-aut-sei=Sanagi
en-aut-mei=Minoru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=NogiShigeji
en-aut-sei=Nogi
en-aut-mei=Shigeji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama University

affil-num=2
en-affil=
kn-affil=Okayama University
en-keyword=Gunn oscillators
kn-keyword=Gunn oscillators
en-keyword=microwave oscillators
kn-keyword=microwave oscillators
en-keyword=nonradiative dielectric waveguides
kn-keyword=nonradiative dielectric waveguides
en-keyword=power combiners
kn-keyword=power combiners
en-keyword=variable-frequency oscillators
kn-keyword=variable-frequency oscillators
END

start-ver=1.4
cd-journal=joma
no-vol=43
cd-vols=
no-issue=1
article-no=
start-page=14
end-page=20
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1995
dt-pub=19951
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Traveling-wave microwave power divider composed of reflectionless dividing units
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We propose a new waveguide type traveling-wave microwave power divider that is adequate for high power applications. The divider is composed of multiple stages of reflectionless dividing units, each having two output ports. Design formulas for reflectionless equal-power dividing are first derived. Structural parameters for wideband design of two- to six-stage dividers are then obtained by means of numerical analyses based on an equivalent circuit. Comparison of experiments at X-band shows good qualitative agreement with the analyses. Typical measured bandwidth for relative divided powers deviation of less than ±0.5 dB was 2.7 GHz, and that for -20 dB return loss was more than 3.2 GHz for the four-stage (eight-way) divider. The divider presented here has excellent features; the bandwidth for equal-power dividing decreases very little and the bandwidth for low return loss increases with increasing number of the dividing stages. It also has advantages of low insertion loss and flexibility over the number of the dividing stages
en-copyright=
kn-copyright=

en-aut-name=SanadaAtsushi
en-aut-sei=Sanada
en-aut-mei=Atsushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=FukuiKiyoshi
en-aut-sei=Fukui
en-aut-mei=Kiyoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NogiShigeji
en-aut-sei=Nogi
en-aut-mei=Shigeji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=SanagiMinoru
en-aut-sei=Sanagi
en-aut-mei=Minoru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama  University

affil-num=2
en-affil=
kn-affil=Okayama  University

affil-num=3
en-affil=
kn-affil=Okayama University

affil-num=4
en-affil=
kn-affil=Okayama University
en-keyword=S-matrix theory
kn-keyword=S-matrix theory
en-keyword=equivalent circuits
kn-keyword=equivalent circuits
en-keyword=losses
kn-keyword=losses
en-keyword=power dividers
kn-keyword=power dividers
END