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Outline |
Miniaturized Isotropic Electric
Field Sensor (OEFS-S1B) is developed for measuring
3D Electric Field of localized area with isotropy.
The sensor consists of a limited use of metal such
as antenna elements and small mirror to avoid generating
electric field noises by metal parts themselves.
This system therefore will not distort the surrounding
electric field and is suitable for measuring the near
field pattern of an antenna for high frequency. |
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Specifications |
| Item |
Performance |
Note |
| Sensitivity |
0.5 to 1000V/m |
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| Frequency
Response |
200MHz to
10GHz |
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| Maximum
Input |
10000V/m |
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| Isotropy |
±0.5dB |
3D(x, y,
z) individual output |
| Sensor Size |
φ12 x 70mm |
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| Output Connector
(RF output) |
N-J |
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| Working
Temperature Range |
0°C to 40°C |
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Outline |
| Optical Electric Field Sensor, OEFS-S1
is 40dB higher sensitivity than OEFS-S1B. The reason
is that the antenna length is longer and the electrode
structure is improved. |
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Specifications |
| Item |
Performance |
| Sensitivity |
5m to
10V/m |
| Frequency
Response |
100kHz to
3GHz |
| Maximum
Input |
100V/m |
| Isotropy |
±0.5dB |
| Sensor Size |
φ30mm x 70mm |
| Output Connector
(RF output) |
N-J |
| Working
Temperature Range |
0°C to 40°C |
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Outline |
| This sensor resonates with a specific
frequency and the sensitivity improves. For example
key less entry signal (315MHz, 433MHs) of a car is
measured with this OEFS-RC and it also check the 3D
distribution of inside of the car precisely. Working
frequency is the one of 150MHz to 950MHz (3dB bandwidth: 10MHz). |
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Specifications |
| Item |
Performance |
| Sensitivity |
30μ to
100m V/m |
| Frequency
Response |
One specific frequency
of 300MHz to 950M |
| Maximum
Input |
1V/m |
| Isotropy |
±0.5dB |
| Sensor Size |
φ50mm x 190mm |
| Output Connector
(RF output) |
N-J |
| Working
Temperature Range |
0°C to 40°C |
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Outline |
This sensor has a SMA connector.
It is good for evaluation of small antenna.
An antenna connects this sensor and the electrical
signal transforms the optical signal (E/O exchange)
at that head.
The signal transmits in optical fiber and it can
precisely measure because Common mode noise cannot
into the fiber. The probe heads are three types depend
on frequency range. |
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Specifications |
| Item |
Performance |
Note |
| Sensor size |
10 x 10 x 50mm |
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| Measurement
frequency range |
300k to 2GHz
300k to 5GHz
300k to 6.5GHz |
OEFS-Probe-2S
OEFS-Probe-5S
OEFS-Probe-6S |
| Insertion Loss |
5±5 dB
10±5 dB
15±5 dB |
OEFS-Probe-2S
OEFS-Probe-5S
OEFS-Probe-6S |
| Stability/td>
| ±0.3 dB |
24°C ,5H |
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Outline |
Optical remote antenna has been
commercialized through joint development with
NHK and NHK ITEC Inc.
The receiver modulate and transmit non-modulated
light sent from a transmitting station to a
duplex TV relay station by using radio waves
being received. It is epoch-making radio-wave
receiver-transmitters where highly sensitive
optical modulators are used.
Optical fibers are used as transmission lines.
They eliminate the use of
power supplies for the receiving stations,
and electrically isolates the transmitting
stations from the receiving stations. It brings
a substantial benefit in preventing the occurrence
of damage due to lightning. Use of passive
circuits only in the receiving station improves
reliability and serviceability.
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Features |
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No need to supply power for
the receiving station in a duplex TV relay
station |
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Reduce risk of damages caused by lightning |
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Significant reduction in maintenance work
for receiving stations |
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Applications |
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Radio-wave transmission systems in FM, VHF
and UHF bands |
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| Item |
Standard Specifications |
| Transmission
Frequency |
Specify one or two channels
between channels 1 to12 and channels 13 to 62. |
| Transmission
Distance |
2,000m (maximum) |
| Fibers Used |
Single mode |
| Optical Wavelength |
Bandwidth : 1.3μm |
Light Source
and
Optoelectronic Section |
Light source |
LD-excited YAG laser |
| Rated Level of Output Optical
Signals |
 23dBm |
| Optical Connector |
FC/PC connector |
| RF Output Level |
60dBm ±20 (variable
by 10dB) |
| RF Output Impedance |
50 TNC-J |
| CN Ratio VHF Band |
Over 50dB
(Receiver RF input level: 60dB μV, Measurement
frequency band: 6MHz) |
| CN Ratio UHF Band |
Over 50dB
(Receiver RF input level: 65dB μV, Measurement
frequency band: 6MHz) |
| DP |
±3° |
| DG |
 3% |
| Supervisory Signal Detection |
Make contact |
| Operating Temperature Range |
Operational temperature
range where performance is guaranteed
-10 to +45 °C (working temperature range) |
| Power Supply |
AC 100V, 50/60Hz, 130W (room
temperature) |
| Dimensions |
Body: 149(H) x 480(W) x
350(D)mm
Fan unit: 49(H) x 480(W) x 350(D)mm (full projections
excluded) |
| Weight |
Body: approx. 10kg, Fan
unit: approx. 2kg |
| Receiving Sensor |
Optical Connector |
FC/PC connector |
| RF Input Level |
60±20dBμV |
| RF Input Impedance |
50
(N-J connector) |
| Dimensions |
49 (H) x 480 (W) x 250
(D)mm (full projection excluded) |
| Weight |
Approx. 4kg |
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Site
Usage Guidelines