Electromagnetic wave detecting device incorporating therein...

Details Electromagnetic wave detecting device incorporating therein... Electromagnetic wave detecting device incorporating therein...

2000-07-12

2001-10-16

Wong, Don (Department: 2821)

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

C343S703000

Reexamination Certificate

active

06304229

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an electromagnetic wave detecting device; and more particularly, an electromagnetic wave detecting device incorporating therein one or more thermocouples.
BACKGROUND OF THE INVENTION
There is shown in
FIG. 1
a conventional electromagnetic wave detecting device
1
including a half-wave dipole antenna
3
and a rectifying diode
5
. In the electromagnetic wave detecting device, an electromagnetic wave is detected by the rectifying diode
5
converting a radio frequency signal to an electrical signal when the half-wave dipole antenna
3
receives an electromagnetic wave.
In such an electromagnetic wave detecting device, it is difficult to manufacture a nonlinear element such as a diode capable of operating in a frequency range greater than the millimeter wave frequency regime (30-300 GHz).
There is shown in
FIG. 2
another conventional electromagnetic wave detecting device
2
for use in a frequency range greater than millimeter waves.
As shown, the electromagnetic wave detecting device
2
includes a half-wave dipole antenna having a pair of arms
12
a,
12
b
for receiving an electromagnetic wave power, a heating element or a heater
13
disposed between the arms
12
a,
12
b
of the dipole antenna, for converting the radiant energy received by the arms
12
a,
12
b
to the thermal energy, a thermal sensor
15
for sensing the temperature changes of the heater
13
, a pair of terminals
17
for measuring the changes in resistance of the thermal sensor
15
, and a pair of signal lines
16
for coupling the thermal sensor
15
and the terminals
17
.
The thermal sensor
15
is conventionally made of a temperature sensitive material, such as vanadium oxide(VO
2
), having a large TCR (temperature coefficient of resistance).
However, such a temperature sensitive material, e.g., VO
2
, requires a heat treatment at higher than, e.g., 500° C., which is not compatible with a CMOS (complementary metal-oxide-semiconductor) process used in forming driving circuitry (not shown) of the electromagnetic wave detecting device. As a result, the detecting device and the driving circuitry may not be fabricated simultaneously in a process, requiring additional fabrication process.
SUMMARY OF THE INVENTION
It is, therefore, a primary object of the present invention to provide an electromagnetic wave detecting device capable operating in the frequency range greater than millimeter waves and incorporating therein at least one of thermocouples capable being manufactured during the forming of the CMOS circuit.
In accordance with one aspect of the present invention, there is provided an electromagnetic wave detecting device comprising a dipole antenna having a pair of disjointed arms for receiving an electromagnetic wave, and a thermocouple having a first and a second leg of two dissimilar conductors, for detecting the electromagnetic wave received by the arms of the antenna.


REFERENCES:
patent: 3750017 (1973-07-01), Bowman et al.
patent: 3794914 (1974-02-01), Aslan

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