Application Notes for RF Switches
SERIES F90
Series F90 switches provide high performance characteristics over the frequency range of 18 to 40 GHz. These
miniature switches measure only .75″ x .95″ x .42″.
The series uses an integrated circuit assembly of up to four PIN diodes mounted in a microstrip transmission line.
The circuit configuration is shown in Fig. 1, below.
Application of a positive current to the bias terminal switches the unit OFF since the diodes are biased to a low
resistance value. With zero or negative voltage at the bias terminal, the diodes are biased to a high resistance and
the unit is switched ON.
SERIES F90
The Series F90 switches are the same as the corresponding Series F90 models except the units are equipped with
integrated drivers as shown in Fig. 2.
The proper current required to switch the unit ON or OFF is provided by the integral driver which is controlled by
an external logic signal. Maximum rise and fall times are less than 10 ns.
- 18 to 40 GHz frequency range
- Low VSWR and Insertion loss
- Up to 75 dB isolation
- Less than 10 ns rise and fall times
PERFORMANCE CHARACTERISTICS
| FREQUENCY (GHz) | |||
|---|---|---|---|
| MODEL NO.(1) | CHARACTERISTIC | 18-26.5 | 26.5-40 |
| 9012, F9012 | Min. Isolation (dB) |
35
|
30
|
| Max. Insertion Loss (dB) |
2.2
|
2.7
|
|
| Max. VSWR (ON) |
2.0
|
2.2
|
|
| 9013*, F9013* | Min. Isolation (dB) |
55
|
50
|
| Max. Insertion Loss (dB) |
2.5
|
3.0
|
|
| Max. VSWR (ON) |
2.0
|
2.2
|
|
| 9014, F9014 | Min Isolation (dB) |
75
|
70
|
| Max. Insertion Loss (dB) |
2.8
|
3.5
|
|
| Max. VSWR (ON) |
2.2
|
2.2
|
|
*Special-order product. Consult factory before ordering.
| Switching Characteristics | |||||||||||||||||||||||||||||||||||
| 10 ns max. | |||||||||||||||||||||||||||||||||||
| 20 ns max. | |||||||||||||||||||||||||||||||||||
| 20 MHz max. | |||||||||||||||||||||||||||||||||||
Power Handling Capability |
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| 1W cw or peak | |||||||||||||||||||||||||||||||||||
| 2W average, 75W peak (1µsec max. pulse width) | |||||||||||||||||||||||||||||||||||
| Power Supply Requirements | |||||||||||||||||||||||||||||||||||
| Driverless Units | |||||||||||||||||||||||||||||||||||
| +35 mA | |||||||||||||||||||||||||||||||||||
| –10V | |||||||||||||||||||||||||||||||||||
| +5V ±2%, 65 mA -12 to -15V, 20 mA |
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| Control Characteristics | |||||||||||||||||||||||||||||||||||
| TTL, advanced Schottky, one unit load. (A unit load is 0.6 mA sink current and 20 µA source current.) | |||||||||||||||||||||||||||||||||||
| Logic “0” (–0.3 to +0.8V) for switch ON and Logic “1” (+2.0 to +5.0V) for switch OFF. | |||||||||||||||||||||||||||||||||||
|
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NOTES
(1) Modeled prefixed with “F” are equipped with integrated TTL-compatible drivers; models without the “F” prefix are current-controlled units and are furnished without drivers.
(2) For driverless units, shaped current pulses must be provided by user.
(3) Not applicable for units without drivers.
DIMENSIONS AND WEIGHT
Dimensions in mm (Inches) Tolerances, unless otherwise indicated: .XX ±.02; .XXX ±.005