81-37-25 Series

Image of Isolators

81-37-25 Series

81-37-25 Series, 144-174 MHz, Dual-Junction Circulator and Isolators are designed to provide the specified isolation under continuous duty at maximum power. Their conservative, rugged design and construction have a record of excellent reliability and high performance established through over 20 years of service in critical systems.

Isolators

  • Provides rated isolation at rated continuous power
  • Standard isolator loads rated to protect against antenna system failure

 

Circulators
Circulators are available in dual or single junction configurations from 300 - 530 MHz and 746-960 MHz.

  • Small package outline
  • Up to 250 watts power handling
  • High isolation throughout bandwidth (no-tuning)
  • Low insertion loss
  • Low PIM Design
  • Wide operation temperature range
  • RoHS compliant
  • Various connector options available
  • Custom configuration options available upon request.

 

Part Number 81-37-25-00 81-37-25-20 81-37-25-50 81-37-25-60 81-37-25-100
RF Load #None82-01-05 82-01-16 82-01-17 82-01-15
Continuous RF None5 W 25 W 60 W 100 W
Dimensions, HxWxD [inches(mm)] 3.94 x 6.25 x 1.78
(100 x 159 x 45)
5.0 x 6.25 x 1.78
(127 x 159 x 45)
8.81 x 6.25 x 1.78
(223 x 159 x 45)
9.91 x 6.39 x 1.78
(252 x 162 x 45)
9.91 x 6.39 x 2.9
(252 x 162 x 74)
Weight, lb. (kg) 2.60 (1.18) 2.78 (1.26)3.24 (1.47)3.88 (1.76)4.60 (2.09)

Downloads:

Manual


Product Specifications 
Item No81-37-25 Series
Item Name144-174 MHz, Dual-Junction Circulator and Isolator
Frequency Range144-174 MHz
Number of Junctions2
Junction TypeLumped Constant
Max Continuous Input Power150 W
Isolation Bandwidth2.5% of center frequency (dB)
Typical Insertion Loss0.9 dB
Insertion Loss1.1 dB
Peak Reverse Isolation>60 dB
Min Reverse Isolation>50 dB
Impedance Ω50
Min Return Loss - VSWR20 dB (1.22 :1)
Temperature Range-30 to +60 °C
Connectors Input-Output-LoadN