Kratos Microwave Israel

Full Line Product Catalog

Model F1938 Bi Phase Modulator

Application Notes for: Microwave Phase Shifters, IQ Vector Modulators & Frequency Translators

The Model F1938 is a high-speed 0o or 180o phase shifter that operates over the 6 to 18 GHz frequency range. It features a double-balanced design that provides excellent phase accuracy over its entire frequency range. The rf design is shown below. The currents required to switch the unit between states are provided by the integrated driver, which is controlled by an external logic signal.

Bi-Phase Modulator block diagram, Model F1938
  • Frequency range: 6-18 GHz
  • Different phase shift: 180o ±10o
  • High speed: 5 nsec (10-90% RF)
  • Low VSWR and Insertion loss
  • Small size, light weight
Model F1938 Bi-Phase Modulator
PERFORMANCE CHARACTERISTICS
Frequency Range 6 to 18 GHz
Differential Phase Shift(1) 180o ±10o
Switching Characteristics (2)
ON Time 20 nsec. Max.
OFF Time 20 nsec. Max.
Rise Time 5 nsec. Max.
Fall Time 5 nsec. Max.
Insertion Loss (1) >6 to 16 GHz, 3 dB max.
>16 to 18 GHz, 3.5 dB max.
VSWR (1) 2.0 max.
Change of Insertion Loss With Phase Shift 1.0 dB max.
Carrier Suppression 20 dB min.
Modulation Rate 10 MHz max.
Power Handling Capability
Without Performance Degradation 1W cw or peak
Survival Power 2W average, 25W peak (1 µsec max. pulse width)
Power Supply Requirements +5V ±5%, 65 mA
-12V to -15V, 20 mA

CONTROL CHARACTERSTICS
Control Input Impedance Schottky TTL, two-unit load. (A unit load is 2 mA sink current and 50 µA source current.)
Control Logic Alternate applications of logic "0" (-0.3 to +0.8V) and logic "1" (+2.0 to +5.0V) switches phases by 180o

NOTES:
  1. With option 85, within Frequency Band of 16 to 18 GHz will be:
    1. Insertion Loss: 4 dB max
    2. Differential Phase Shift: 180o ±15o
    3. VSWR: 2.2:1 max.
  2. As measured with a phase bridge.

OPTION (G09) ENVIRONMENTAL RATINGS
Operating Temperature Range -55°C to + 110°C
Non-Operating Temperature Range -65°C to + 125°C
Humidity MIL-STD-202F, Method 103B, Cond. B (96 hrs. at 95%)
Shock MIL-STD-202F, Method 213B, Cond. B (75G, 6 msec)
Vibration MIL-STD-202F, Method 204D, Cond. B (.06" double amplitude or 15G, whichever is less)
Altitude MIL-STD-202F, Method 105C, Cond. B (50,000 ft.)
Temp. Cycling MIL-STD-202F, Method 107D, Cond. A, 5 cycles

AVAILABLE OPTIONS
Option No. Description
3 SMA female control connector
7 Two SMA male RF connectors
10 One SMA (J1) male and one SMA female (J2) RF connector
33 EMI filter solder-type control terminal
85 SMA RF connectors (see note (1) above for specification change with this option).
G09 Guaranteed to meet Environmental Ratings
G12 RoHS Compliant
G18 RREAC Compliant

DIMENSIONS AND WEIGHT
Model F1938 Bi-phase modulator dimensions and weights

Dimensions are stated in inches (mm). Tolerances, unless otherwise indicated: .XX ±.02; .XXX ±.008

 


The information contained in this data sheet is basic marketing information and does not contain any export controlled information.