Ferrite Isolators

VHF/UHF Ferrite Isolators

Horwin FI-V/Ux-x series is a ferrite isolators used for protection and isolation of VHF/UHF transmitters. There are two major benefits of isolator application: to prevent transmitter failure due to the high SWR and to prevent intermodulation caused by the nearby strong transmitting signal (signals). There are two model versions regarding power handling capability – low power up to 50 watts and high – up to 100 watts.

There are two models with single or dual ferrite isolators and low/high power versions. Isolator nominal impedance is 50 Ohms. N-type “female” connectors are used for input/output connections.

Ferrite isolator modules are mounted into aluminium housing with radiator. Loading element is non removable. The isolators have black polymer powdered coating.

Isolators are tuned at customer specified frequency because no further tuning is possible, so transmit frequency should be specified when ordering.

FI            ferrite isolator
x             frequency range (V=VHF, U=UHF)
x             isolator type (1=single, 2=dual)
x             input power (L=50W, H=100W)

Model

Frequency range, MHz

Type

Isolation, dB

Insertion loss, dB

FI-V1-L

144 – 174

single isolator,
low power

 > 30 < 0.4

FI-V2-L

144 – 174

dual isolator,
high power

 > 60 < 0.8

FI-V1-H

144 – 174

single isolator,
low power

> 30

< 0.4

FI-V2-H

144 – 174

dual isolator,
high power

> 60

< 0.8

FI-U1-L

400 – 470

single isolator,
low power

> 30

 < 0.4

FI-U2-L

400 – 470

dual isolator,
high power

> 60

< 0.8

FI-U1-H

400 – 470

single isolator,
low power

> 30

< 0.4

FI-U2-H

400 – 470

dual isolator,
high power

> 60

 < 0.8