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High Power Series RF Filters

Lowpass Filters - Cutoff Frequencies: 3 MHz to 100 MHz

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High Power Lowpass Filters from 3 MHz to 100MHZ. available in 50, 200, 500 and 1000-Watt Versions. These filters are designed to be used in any high power application.
  • Suitable for bandwidth limiting on high power transmitters.
  • Impedance invariant design is compatible with all antenna tuners.
  • Meets applicable requirements of MIL-STD-810E.

Shape
Factor
40 dB Min
@ x FC
A 5.7 x FC
B 2.3 x FC
C 1.6 x FC
D 1.4 x FC
E 1.3 x FC
Multiply the Cutoff Frequency by the Shape Factor to find the 40 dB Frequency.
For Example:
Cutoff Frequency = 3MHz
with SHAPE FACTOR A.
40dB FREQUENCY = 3 MHz
 x 5.7 = 17.1 MHz 
    

                        
or


with SHAPE FACTOR B.
40dB FREQUENCY = 3 MHz
  x 2.3 = 6.9 MHz

BASIC SPECIFICATIONS:

  • Filter type = Lowpass Filter,

  • Cutoff frequencies = 3 MHz - 100 MHz,

  • Passband Insertion Loss < 0.3 dB, Typical

  • VSWR better than 1.5 : 1 over Passband,

  • Impedance is 50 Ohms,

  • Rejection > 40 dB to 10 x Fc

  • Power Handling = 50W, 100W, 500W, 1000W

  • Mounting Brackets are supplied on all units

  • Available connectors are

    • BNC,

    • TYPE N ,

    • UHF female

    • 50 Watt versions available with SMA connectors.

   

Cans are Cold Rolled Steel 
Electro Tin plated or Hot Tin dipped.   

These filters are normally supplied with N Female connectors but can be ordered with BNC connectors and SO-239 UHF connectors.

All the filters are supplied in Hermitically sealed Metal cases designed for tough applications.

They resist shock, vibration, high and low temperature extremes, salt, sand, dust and leakage.

The filters were designed to meet  applicable requirements of MIL-STD-810E (Environmental test Methods) and MIL-F-14072D (Finishes for ground based Equipment) that are listed below.

Environmental  test methods
ALTITUDE: METHOD 500 3,    PROCEDURE 1, 11, AND III TEST ALTITUDE FOR PROCEDURE III IS 4,570 METERS AT 57 2 kPa.
HIGH TEMPERATURE: METHOD 501-3, PROCEDURE I TO +70 C
 NON-OPERATING, AND PROCEDURE  11 TO +60'C OPERATING.
LOW TEMPERATURE: METHOD 502.3, PROCEDURE I TO -51 C
NON-OPERATING, AND PROCEDURE 11  TO -40"C OPERATING.
TEMPERATURE SHOCK: METHOD 503.3,  LOW TEMPERATURE -51 "C AND HIGH TEMP. +48"C.
SOLAR RADIATION: METHOD 505.3, PROCEDURE 1, HOT-DRY TEMPERATURE CONDITIONS
RAIN: METHOD 506.3, PROCEDURE I
HUMIDITY: METHOD 507.3, PROCEDURE 111.
FUNGUS: METHOD 508.4.
SALT FOG: METHOD 509 3, PROCEDURE I
SAND AND DUST: METHOD 510 3 PROCEDURE I AND 11
LEAKAGE (IMMERSION): METHOD 512.3, PROCEDURE 1, 2 HOURS AT 1.0 METER
VIBRATION: METHOD 514 4, CATEGORIES 1, 3 AND 8 (TABLE 514 4-AIII)
SHOCK: METHOD 516.4, PROCEDURE 1, V, AND VI.
ICING/FREEZING RAIN: METHOD 521.1. 

        ORDERING INFORMATION

SAMPLE:   10.5 MHz Cutoff, Shape Factor A, 1000 Watts, UHF Connectors
                      = HPLP-10P50-A-01K-U

SAMPLE:  3.25 MHz Cutoff, Shape Factor E, 50 Watts, SMA Connectors
                      = HPLP-03P25-E-050-S

SAMPLE:  100 MHz Cutoff, Shape Factor B, 500 Watts, Type N Connectors
                      = HPLP-100P0-B-500-N

 

CUTOFF FREQUENCY

SHAPE
FACTOR
(SEE GRAPH)

40 dB
FREQUENCY

3.0 MHz

A

17.1 MHz

B

6.90 MHz

C

4.80 MHz

D

4.20 MHz

E

3.90 MHz

5.0 MHz

A

28.5 MHz

B

11.5 MHz

C

9.20 MHz

D

7.00 MHz

E

6.50 MHz

10.0 MHz

A

57.0 MHz

B

23.0 MHz

C

16.0 MHz

D

14.0 MHz

E

13.0 MHz

15.0 MHz

A

85.5 MHz

B

34.5 MHz

C

24.0 MHz

D

21.0 MHz

E

19.5 MHz


20.0 MHz

A

114 MHz

B

46.0 MHz

C

32.0 MHz

D

28.0 MHz

E

26.0 MHz

25.0 MHz

A

142 MHz

B

57.5 MHz

C

40.0 MHz

D

35.0 MHz

E

32.5 MHz

30.0 MHz

A

171 MHz

B

69.0 MHz

C

48.0 MHz

D

42.0 MHz

E

39.0 MHz

CUTOFF FREQUENCY

SHAPE
FACTOR
(SEE GRAPH)

40 dB
FREQUENCY

40.0 MHz

A

228 MHz

B

92.0 MHz

C

64.0 MHz

D

56.0 MHz

E

52.0 MHz

50.0 MHz

A

285 MHz

B

115 MHz

C

80.0 MHz

D

70.0 MHz

E

65.0 MHz

60.0 MHz

A

342 MHz

B

138 MHz

C

96.0 MHz

D

84.0 MHz

E

78.0 MHz

70.0 MHz

A

399 MHz

B

161 MHz

C

112 MHz

D

98.0 MHz

E

91.0 MHz

80.0 MHz

A

456 MHz

B

184 MHz

C

128 MHz

D

112 MHz

E

104 MHz

90.0 MHz

A

513 MHz

B

207 MHz

C

144 MHz

D

126 MHz

E

117 MHz

100 MHz

A

570 MHz

B

230 MHz

C

160 MHz

D

140 MHz

E

130 MHz


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