Electro-Metrics LPA-30 User manual

INSTRUCTION MANUAL
LOG PERIODIC
ANTENNA
MODEL LPA-30
200 MHz - 1 GHz

INSTRUCTION MANUAL
THIS INSTRUCTION MANUAL AND ITS
ASSOCIATED INFORMATION IS
PROPRIETARY. UNAUTHORIZED
REPRODUCTION IS FORBIDDEN.
1993 ELECTRO-METRICS CORP.
LOG PERIODIC
ANTENNA
200 MHz - 1 GHz
ELECTRO-METRICS
MODEL LPA-30
SERIAL NO: N/A
ELECTRO-METRICS CORPORATION
231 Enterprise Road, Johnstown, New York 12095
Phone: [phone] Fax: [phone]
EMAIL: [email protected] WEB: http://www.electro-metrics.com
MANUAL REV. NO: LPA30-0993 ISSUE DATE: SEPTEMBER 01 1993

WARRANTY
This Model LPA-30 Log Periodic Antenna is warranted for a
period of 12 months (USA only) from date of shipment against
defective materials and workmanship. This warranty is limited to
the repair of or replacement of defective parts and is void if
unauthorized repair or modification is attempted. Repairs for
damage due to misuse or abnormal operating conditions will be
performed at the factory and will be billed at our commercial
hourly rates. Our estimate will be provided before the work is
started.

ELECTRO-METRICS LPA-30
(LPA30-1)
DESCRIPTION AND USE ELECTRO-METRICS
MODEL LPA-30 LOG PERIODIC ANTENNA
1.0 Description
The LPA-30 Log Periodic Antenna is a linearly polarized broadband antenna
designed to operate from 200 to 1000 MHz. The antenna is capable of operating as either
a transmitting or receiving antenna. The linearly polarized design permits separate
measurement of horizontal and vertical electric field components over its operating
frequency range.
The antenna is constructed of aluminum and phenolic with a Type N connector.
The antenna attaches to the Electro-Metrics Model TRI-136 Tripod using a derlin support
rod (supplied) equipped with an aluminum base (5/8-11 threaded female connector). This
allows the LPA-30 to be mounted at any point within a 90° arc in a horizontal plane. The
antenna is portable and suitable for use in applications where space is limited; e.g.
shielded rooms.
The antenna is calibrated at 1 and 3 meters with the calibration data included in
the manual as gain and antenna factors vs frequency. The LPA-30 can be used for Speci-
fication Compliance Testing and is suitable for susceptability testing. The antenna is
capable of handling up to a maximum power level of 1 kW.
NOTE: When performing measurements using the LPA-30
always include the level of attenuation within the
measurement system plus coaxial cable losses, in
addition to the actual antenna factors, for determining
the signal level being measured.
Table 1.0 gives the approximate power required when the LPA-30 Antenna is
used in radiated susceptibility testing. The power levels shown are based on the typical
gain of the antenna and do not include cable losses between the power source and antenna
terminals.
2.0 Specifications
2.1 Electrical
Frequency Range: 200 to 1000 MHz.
Input Impedance: Calibrated in a 50system.
Connector: Type N.
Average VSWR: Less than 2:1.

ELECTRO-METRICS LPA-30
(LPA30-2)
2.2 Mechanical
Length: 749 mm (29.5 inches).
Width: 749 mm (29.5 inches) maximum.
Depth: 63.5 mm (2.5 inches).
Weight: 1.8 kg (4 lbs).

ELECTRO-METRICS LPA-30
(LPA30-3)
TABLE 1.0
APPROXIMATE POWER REQUIREMENTS VS FREQUENCY
FOR FIELD STRENGTHS AT 1 METER SPACING
ELECTRO-METRICS MODEL LPA-30 LOG PERIODIC ANTENNA
(MAXIMUM POWER 1 kW)
FREQ.
(MHz)
TYP.
ANT.
FACT.
TYP.
GAIN
NUM.
TYP.
GAIN
dB
1 V/m
PWR
(W)
REQ.
10 V/m
PWR
(W)
REQ.
20 V/m
PWR
(W)
REQ.
100 V/m
PWR
(W)
REQ.
200 V/m
PWR
(W)
REQ.
200
17.0
0.84
-0.8
0.04
4.0
15.9
397.9
****
225
14.8
1.76
2.5
0.02
1.9
7.6
189.5
757.8
250
14.3
2.44
3.9
0.01
1.4
5.5
136.8
547.1
275
14.9
2.57
4.1
0.01
1.3
5.2
129.8
519.1
300
16.8
1.97
3.0
0.02
1.7
6.8
168.9
675.6
325
17.5
1.97
2.9
0.02
1.7
6.8
169.1
676.4
350
18.7
1.73
2.4
0.02
1.9
7.7
192.2
768.8
375
17.5
2.62
4.2
0.01
1.3
5.1
127.0
508.0
400
17.1
3.27
5.2
0.01
1.0
4.1
101.8
407.2
425
17.4
3.45
5.4
0.01
1.0
3.9
96.6
386.5
450
18.4
3.07
4.9
0.01
1.1
4.3
108.5
434.0
475
19.8
2.48
3.9
0.01
1.3
5.4
134.4
537.7
500
20.5
2.34
3.7
0.01
1.4
5.7
142.5
570.2
525
19.2
3.48
5.4
0.01
1.0
3.8
95.8
383.4
550
19.5
3.56
5.5
0.01
0.9
3.7
93.6
374.3
575
19.7
3.72
5.7
0.01
0.9
3.6
89.6
358.6
600
20.7
3.22
5.1
0.01
1.0
4.1
103.7
414.6
625
21.5
2.90
4.6
0.01
1.1
4.6
114.8
459.4
650
22.0
2.80
4.5
0.01
1.2
4.8
119.1
476.6
675
21.6
3.31
5.2
0.01
1.0
4.0
100.8
403.0
700
21.6
3.56
5.5
0.01
0.9
3.7
93.7
374.8
725
22.1
3.40
5.3
0.01
1.0
3.9
98.0
392.0
750
22.7
3.17
5.0
0.01
1.1
4.2
105.1
420.5
775
22.8
3.31
5.2
0.01
1.0
4.0
100.8
403.0
800
22.6
3.69
5.7
0.01
0.9
3.6
90.3
361.2
825
22.6
3.93
5.9
0.01
0.8
3.4
84.9
339.6
850
23.2
3.63
5.6
0.01
0.9
3.7
91.8
367.4
875
24.0
3.20
5.1
0.01
1.0
4.2
104.2
416.8
900
24.4
3.09
4.9
0.01
1.1
4.3
108.0
432.0
925
24.3
3.34
5.2
0.01
1.0
4.0
99.9
399.6
950
23.9
3.86
5.9
0.01
0.9
3.5
86.4
345.5
975
24.4
3.62
5.6
0.01
0.9
3.7
92.0
368.1
1000
25.1
3.24
5.1
0.01
1.0
4.1
102.8
411.1
****: Not recommended

ELECTRO-METRICS LPA-30
(LPA30-4)
ELECTRO-METRICS
GAIN AND ANTENNA FACTORS
MODEL LPA-30
LOG PERIODIC ANTENNA
1 METER CALIBRATION
PAGE 5A
3 METER CALIBRATION
PAGE 6A
10 METER CALIBRATION
PAGE 7A

ELECTRO-METRICS LPA-30
(LPA30-5)
ELECTRO-METRICS
GAIN AND ANTENNA FACTORS
MODEL LPA-30
LOG PERIODIC ANTENNA
1 METER CALIBRATION
PAGE 5A

ELECTRO-METRICS LPA-30
(LPA30-6)
ELECTRO-METRICS
GAIN AND ANTENNA FACTORS
MODEL LPA-30
LOG PERIODIC ANTENNA
3 METER CALIBRATION
PAGE 6A

ELECTRO-METRICS LPA-30
(LPA30-7)
ELECTRO-METRICS
GAIN AND ANTENNA FACTORS
MODEL LPA-30
LOG PERIODIC ANTENNA
10 METER CALIBRATION
PAGE 7A