|
Test
Equipment, Individually Calibrated Antennas and Accessories
for EMC Testing
Biconical
Antennas, 20 to 1000 MHz, Transmit and Receive
Our BCD
and BCH series of passive, biconical-dipole antennas
are an excellent choice for measurements of electric field
strengths. Their compact size and broadband characteristics
make them ideal for use in shielded rooms and anechoic chambers.
The BCD-235 is suitable for measuring radiated emissions
as per FCC, EN/CISPR SAE, MIL-STD and Tempest requirements.
The BCH series
antennas offer broadband capability for radiated susceptibility
testing as per SAE and MIL-STD requirements. Each biconical
contains a broadband balun to match the characteristic impedance
of the antenna to an unbalanced 50-ohm output. BCH series
antennas can handle input power levels up to 1 kW.
The BCD-235 may be supplied with collapsible elements
for ease of transport and storage. The elements and the
pedestal are made of aluminum to provide a durable, light-weight,
corrosion-resistant laboratory instrument. These antennas
are designed primarily for indoor use and can be used outdoors
in favorable weather. US Patent No: 5, 367, 312.
The VBC series
Vertical Biconical antennas are intended for all-weather
applications. When used for receive only, it is preferable
to include the optional low noise amplifier. The VBC-210
is offered as a transmit antenna for susceptibility testing.
It has significantly better antenna factors than our BCH-2030
for use below 50 MHz. The VBC antennas are well isolated
from the base, resulting in a predictable elevation pattern
and reduction in common mode interference. The VBC series
antennas are designed to withstand laminar wind flow velocities
in excess of 100 miles per hour. Antenna elements are removable
for ease of transport and storage. An optional cross arm
mounting adapter allows the VBC-210 to be mounted
from the center to manually adjust polarization.
SPECIFICATIONS
Ú
Ú
Ú Ú
Ú Ú
Ú Ú
Ú Ú
INDIVIDUALLY CALIBRATED Ú
Ú Ú
Ú Ú
Ú Ú
Ú Ú
Ú
|
|
BCD-235/B
|
BCH-2030/A
|
BCH-3030/A
|
VBC-210
|
|
Frequency
|
20 - 350 MHz
|
20 - 300 MHz
|
30 - 300 MHz
|
20 - 1000 MHz
|
|
Polarization
|
Linear/Adjustable
|
Linear/Adjustable
|
Linear/Adjustable
|
Vertical
|
|
Impedance
|
50 ohms
|
50 ohms
|
50 ohms
|
50 ohms
|
|
VSWR (typ.)
|
2.0 : 1
|
2.5 : 1
|
2.5 : 1
|
2.5 : 1
|
|
Cont. Power
|
1 W
|
1 kW
|
300 W
|
500 W
|
|
Peak Power
|
N/A
|
2 kW
|
500 W
|
500 W
|
|
Connector
|
BNC Female
|
N Female
|
N Female
|
N Female
|
|
Length
|
54"
|
53"
|
52"
|
10 ft overall
|
|
Element Dia.
|
19.5"
|
21"
|
21"
|
6 ft
|
|
Weight (lbs/kg)
|
5 / 2.3
|
7 / 3.2
|
6 / 2.7
|
22.5 / 10
|
|
Construction
|
Rigid
|
Rigid
|
Rigid
|
Removable Elements
|
Options
|
BCD
Series:
1) Collapsible Elements (Model
BCD-235/C)
2) Carrying Case
3) Tripod Mount with Adaptor
4) Tripod TP-5
5) Tripod Pan/Tilt head
|
VBC
Series:
Cross arm mounting for adjustable
polarization
(Model VBC-210/C)
|
BCD
- 235/B AND BCH - 2030/A -
Typical Electric Field Antenna Factor
BCH-2030/A
|
Typical
Antenna Factor
|
|
Frequency
|
AFE
|
Gain
|
|
(MHz)
|
(dB m-1)
|
(dBi)
|
|
20
|
11.74
|
-15.50
|
|
25
|
9.98
|
-11.80
|
|
30
|
8.76
|
-9.00
|
|
50
|
5.00
|
-0.80
|
|
60
|
5.66
|
0.12
|
|
70
|
7.12
|
0.00
|
|
80
|
8.36
|
-0.08
|
|
90
|
9.55
|
-0.25
|
|
100
|
10.22
|
0.00
|
|
150
|
13.74
|
0.00
|
|
200
|
15.24
|
1.00
|
|
250
|
14.48
|
3.70
|
|
300
|
17.06
|
2.70
|
|
400
|
19.3
|
2.97
|
|
500
|
24.1
|
0.11
|
|
600
|
24.8
|
0.99
|
|
700
|
26.3
|
0.83
|
|
850
|
27.1
|
1.72
|
|
1000
|
28.2
|
2.03
|
|
|
Typical
Antenna Factor
|
| |
3 meter spacing
|
1 meter spacing
|
|
Frequency
|
AFE
|
Gain
|
AFE
|
Gain
|
|
(MHz)
|
(dB m-1)
|
(dBi)
|
(dB m-1)
|
(dBi)
|
|
20
|
17.00
|
-20.76
|
11.70
|
-15.46
|
|
25
|
14.00
|
-15.82
|
13.00
|
-14.83
|
|
30
|
12.50
|
-12.74
|
13.00
|
-13.24
|
|
50
|
10.25
|
-6.05
|
11.10
|
-6.90
|
|
60
|
10.00
|
-4.22
|
9.00
|
-3.22
|
|
70
|
10.00
|
-2.88
|
9.60
|
-2.48
|
|
80
|
10.00
|
-1.72
|
10.40
|
-2.12
|
|
90
|
10.25
|
-0.95
|
9.70
|
-0.40
|
|
100
|
10.50
|
-0.28
|
10.70
|
-0.48
|
|
150
|
12.50
|
1.24
|
12.40
|
1.34
|
|
200
|
15.00
|
1.24
|
15.90
|
0.34
|
|
250
|
17.00
|
1.18
|
18.80
|
-0.62
|
|
300
|
20.50
|
-0.74
|
21.80
|
-2.04
|
|
|
