US 2002/0158709 A1 · Junction structure of dielectric strip, nonradiative dielectric waveguide, and millimeter-wave transmitting/receiving apparatus

Abstract

An object of the present invention is to provide an NRD guide which can be used in a wide band in a state where output levels of distributed high-frequency signals are nearly equal and does not require precise positioning, thereby enhancing mass productivity thereof. The NRD guide comprises a first straight dielectric strip made of cordierite ceramics having a dielectric constant of 4.8 and a dielectric loss of 2.7×10−4 (at a measurement frequency of 77 GHz) and having a section of 1.0 mm width×2.25 mm height, and a second dielectric strip joined to the first dielectric strip at a midway position thereof so as to be branched along an arc and bent at an angle of 90°, wherein the first and second dielectric strips are integrally produced, and the radius of curvature r of a junction (branched portion) of the second dielectric strip is 12.7 mm, which is larger than the wavelength λ≈5 mm of high-frequency signals of 60 GHz.

Claims27

Dependent claims

A junction structure of dielectric strips comprising:

a first straight dielectric strip for propagating high-frequency signals;
and
a second dielectric strip which is joined to the first dielectric strip at a midway point thereof,
wherein a junction between the second dielectric strip and the first dielectric strip is formed along an arc and the radius of curvature thereof is equal to or more than the wavelength of the high-frequency signals.

1 more element

A millimeter-wave transmitting/receiving apparatus comprising:

(a) a voltage-controlled oscillating portion comprising:
a high-frequency diode for outputting high-frequency signals of millimeter-wave band, and
a variable capacitance diode placed so that a bias voltage applying direction coincides with an electric field direction of the high-frequency signals, for outputting the high-frequency signals as frequency-modulated transmission millimeter-wave signals by periodically controlling bias voltage,
the voltage-controlled oscillating portion being installed at an end of a first dielectric strip;
(b) a second dielectric strip which is joined, along an arc having a radius of curvature r not less than the wavelength λ of the transmission millimeter-wave signals, to a straight portion of the first dielectric strip on the downstream side from the voltage-controlled oscillating portion in the direction for transmitting the transmission millimeter-wave signals of the first dielectric strip;
(c) a circulator which has an input end, an input/output end and an output end,
the circulator being connected to the other end of the first dielectric strip at the input end,
for outputting transmission millimeter-wave signals inputted into the input end to the input/output end, and
outputting reception signals inputted into the input/output end to the output end;
(d) a third dielectric strip, one end of which is connected to the input/output end of the circulator, and on the other end side of which is disposed a transmission/reception antenna;
(e) a fourth dielectric strip, one end of which is connected to the output end of the circulator;
(f) a mixer for connecting the second dielectric strip and the fourth dielectric strip to mix respective signals transmitted to the second and fourth dielectric strips to generate intermediate frequency signals;
and
(g) a pair of conductor plates which are placed in parallel at a spacing equal to or less than one half of the wavelength λ of the millimeter-wave signals, in which spacing are disposed the first to fourth dielectric strips, the voltage-controlled oscillating portion, the circulator and the mixer.

11 more elements

A millimeter-wave transmitting/receiving apparatus comprising:

(a) a high-frequency diode which outputs high-frequency signals of millimeter-wave band;
(b) a first dielectric strip, one end of which is connected to the high-frequency diode, for propagating high-frequency signals outputted from the high-frequency diode;
(c) a pulse-modulating diode interposed between the first dielectric strip or installed therealong, so that a bias voltage applying direction coincides with an electric field direction of the high-frequency signals, for outputting transmission millimeter-wave signals which are pulse-modulated signals of the high-frequency signals by on-off of bias voltage;
(d) a second dielectric strip which is joined, along an arc having a radius of curvature r not less than the wavelength λ of the transmission millimeter-wave signals, to a straight portion of the first dielectric strip on the downstream side from the high-frequency diode of the first dielectric strip in the transmission direction of the transmission millimeter-wave signals;
(e) a circulator which has an input end, an input/output end and an output end,
the circulator being connected to the other end of the first dielectric strip at the input end,
outputting transmission millimeter-wave signals inputted into the input end to the input/output end, and
outputting reception signals inputted into the input/output end to the output end;
(f) a third dielectric strip, one end of which is connected to the input/output end of the circulator, and on the other end side of which is disposed a transmission/reception antenna;
(g) a fourth dielectric strip, one end of which is connected to the output end of the circulator;
(h) a mixer for connecting the second dielectric strip and the fourth dielectric strip to mix respective signals transmitted to the second and fourth dielectric strips to generate intermediate frequency signals;
and
(i) a pair of conductor plates which are placed in parallel at a spacing equal to or less than one half of the wavelength λ of the millimeter-wave signals, in which spacing are disposed the first to fourth dielectric strips, the pulse modulating diode, the circulator and the mixer.

10 more elements

A millimeter-wave transmitting/receiving apparatus comprising:

(a) a voltage-controlled oscillating portion comprising:
a high-frequency diode for outputting high-frequency signals of millimeter-wave band, and
a variable capacitance diode placed so that a bias voltage applying direction coincides with an electric field direction of the high-frequency signals, for outputting the high-frequency signals as frequency-modulated transmission millimeter-wave signals by periodically controlling bias voltage,
the voltage-controlled oscillating portion being installed at an end of a first dielectric strip;
(b) a second dielectric strip which is joined, along an arc having a radius of curvature r not less than the wavelength λ of the transmission millimeter-wave signals, to a straight portion of the first dielectric strip on the downstream side from the voltage-controlled oscillating portion in the direction for transmitting the transmission millimeter-wave signals of the first dielectric strip;
(c) a circulator which has an input end, an input/output end and an output end,
the circulator being connected to the other end of the first dielectric strip at the input end,
outputting transmission millimeter-wave signals inputted into the input end to the input/output end, and
outputting reception signals inputted into the input/output end to the output end;
(d) a third dielectric strip, one end of which is connected to the input/output end of the circulator, and on the other end side of which is disposed a transmission/reception antenna;
(e) a terminator which is connected to the output end of the circulator;
(f) a fourth dielectric strip having an end at which a reception antenna is provided, for guiding received millimeter-wave signals;
(g) a mixer for connecting the second dielectric strip and the fourth dielectric strip to mix respective signals transmitted to the second and fourth dielectric strips to generate intermediate frequency signals;
and
(h) a pair of conductor plates which are placed in parallel at a spacing equal to or less than one half of the wavelength λ of the millimeter-wave signals, in which spacing are disposed the first to fourth dielectric strips, the voltage-controlled oscillating portion, the circulator and the mixer.

12 more elements

A millimeter-wave transmitting/receiving apparatus comprising:

(a) a high-frequency diode which outputs high-frequency signals of millimeter-wave band;
(b) a first dielectric strip, one end of which is connected to the high-frequency diode, for propagating high-frequency signals outputted from the high-frequency diode;
(c) a pulse-modulating diode interposed between the first dielectric strip or installed therealong, so that a bias voltage applying direction coincides with an electric field direction of the high-frequency signals, for outputting transmission millimeter-wave signals which are pulse-modulated signals of the high-frequency signals by on-off of bias voltage;
(d) a second dielectric strip which is joined, along an arc having a radius of curvature r not less than the wavelength λ of the transmission millimeter-wave signals, to a straight portion of the first dielectric strip on the downstream side from the high-frequency diode of the first dielectric strip in the transmission direction of the transmission millimeter-wave signals;
(e) a circulator which has an input end, an input/output end and an output end,
the circulator being connected to the other end of the first dielectric strip at the input end,
for outputting transmission millimeter-wave signals inputted into the input end to the input/output end, and
outputting reception signals inputted into the input/output end to the output end;
(f) a third dielectric strip, one end of which is connected to the input/output end of the circulator, and on the other end side of which is disposed a transmission antenna;
(g) a terminator which is connected to the output end of the circulator;
(h) a fourth dielectric strip having an end at which a reception antenna is provided, for guiding received millimeter-wave signals;
(i) a mixer for connecting the second dielectric strip and the fourth dielectric strip to mix respective signals-transmitted to the second and fourth dielectric strips to generate intermediate frequency signals;
and
(j) a pair of conductor plates which are placed in parallel at a spacing equal to or less than one half of the wavelength λ of the millimeter-wave signals, in which spacing between the conductor plates are disposed the first to fourth dielectric strips, the pulse-modulating diode, the circulator and the mixer.

11 more elements

Dependencies are inferred from the claim text.

Junction structure of dielectric strip, nonradiative dielectric waveguide, and millimeter-wave transmitting/receiving apparatus

Life of this patent

Junction structure of dielectric strip, nonradiative dielectric waveguide, and millimeter-wave transmitting/receiving apparatus

Life of this patent

Abstract

Claims27