AVX-M AND AVX-MR SERIES
IMPEDANCE MATCHING
PULSE
TRANSFORMERS
AVX-M IMPEDANCE MATCHING
PULSE TRANSFORMERS
• Rise times to 100 ps
• Matching to 3, 12.5, 200 and 450 Ohms
• Amplitudes to 350 Volts
• Pulse widths to 100 ns
The AVX-M series is designed to be used with general-purpose
laboratory pulse generators and with Avtech nanosecond pulse
generators to match to other impedance levels or to obtain higher
output currents. This series is also useful in ultra broadband CW
applications (to 4 GHz). For example, the AVX-M series may be
used on the outputs of the AVP, AVI or AVL series to double or
quadruple the peak output current as may be required for pulse
testing of high current laser diodes and other low impedance loads
(see the Applications Information Section, page 107 for details).
One nanosecond rise time units are packaged in a 1.5" x 1.1" x 0.9"
cast aluminum chassis with microstrip solder terminals as shown
above (12.5 Ohm models) or parallel solder stud terminals (200
and 450 MHz models). The load is soldered via short leads to the
output terminals. 100 ps rise time units are packaged in a
miniature epoxy coated module as shown above. The load is
soldered via short leads to the output terminals which consist of a
short length of microstrip line with the ground plane bordering the
output center conductor.
See the AVX-MR Series for transformers with higher voltage and
pulse width ratings.
Model: AVX-M1* AVX-M2 AVX-M3* AVX-M4
Impedance:
(Ohm) 50 to 200 50 to 450 50 to 12.5
50 to 3
Rise time*: 1 ns 2 ns 1 ns 1 ns
Droop: 10% for 100 ns pulse width
Max. input: 350 Volts
3 dB
bandwidth*: 200 MHz - 200 MHz
Propagation
delay: 1.4 ns - 1.4 ns 2 ns
Input
connectors: SMA
Output
connectors: Parallel solder tabs (one grounded)
Size:
(H x W x D) 38 mm x 28 mm x 23 mm (1.5” x 1.1” x 0.9”)
or 15 mm x 15 mm x 15 mm (0.6” x 0.6” x 0.6”)*
Chassis
material: cast aluminum, blue enamel
or epoxy coated module*
*Fast rise time option: 100 ps rise time also available but with PW and max
input reduced by factors of 10. For fast rise time option
suffix model No. by -S. -S units exhibit 3 dB bandwidths
of 4 GHz and pulse propagation delay times of 0.2 ns.
AVX-MR SERIES
MATCHING TRANSFORMERS
• Voltage-doubling units (to 200 Ohms)
• Output amplitudes to 800 Volts
• Current-doubling and quadrupling units (to 3 Ohms)
• Output amplitudes to 16 Amperes
• Pulse widths to 10 µs
• 8 models
Avtech offers a complete range of high-amplitude, high-pulse width
voltage-doubling (-MRA series) and current-doubling matching
transformers (-MRB series).
For voltage-doubling applications, Avtech offers 3 models rated at
peak input voltages of 100, 200 and 400 Volts all with maximum
pulse width ratings of 5.0 µs and rise times of less than 5 ns.
Voltage-doubling transformers require a load impedance of 200
Ohms (or higher).
Avtech's line of 3 current-doubling transformers also have peak
input voltage ratings of 100, 200 and 400 Volts and maximum
pulse width ratings of 5 µs but the units require load impedances of
12.5 Ohms. In addition, Avtech offers a current-doubling
transformer (AVX-MRB5) and a current quadrupling transformer
(AVX-MRB6) specifically designed for use with the AV-1010-C,
AV-1011-C and AV-1015-C pulse generators.
Package sizes range from 1.1" x 1.3" x 2.3" to 1.7" x 2.6" x 4.3"
and most models have BNC connectors (type N output connectors
on units providing output amplitudes greater than 500 Volts and
micro-strip output terminals on the AVX-MRB5 and -MRB6). It
should be noted that the input port of the transformer includes a
shunt 470 Ohm resistance followed by a series DC blocking
capacitor and as a consequence the input and output ports are not
reversible.
Model: AVX-MRA1
(AVX-MRB1) AVX-MRA2
(AVX-MRB2)
AVX-MRA4
(AVX-MRB4)
Max. Voltage
in (Volts) 100
(100) 200
(200) 400
(400)
Max. Volts out
(Volts): 200
(50) 400
(100) 800
(200)
Max. pulse width: 5 µs
Impedance:
(Ohms) 50 to 200
(50 to 12.5)
Rise time: 1 ns 3 ns 5 ns
Droop (max): ≤ 5%
Dimensions:
(H x W x D) 28 x 33 x 50 mm
(1.1” x 1.3” x 2.3”) 43 x 76 x 76 mm
(1.7” x 3.0” x 3.0”) 43 x 66 x 109 mm
(1.7” x 2.6” x 4.3”)
Connectors: BNC-BNC
(BNC-BNC) BNC-BNC
(BNC-BNC) BNC-N
(BNC-BNC)
Model: AVX-MRB5 AVX-MRB6
Max. Volts in: 100 100
Max. Volts out: 50 25
Max. Amps out: 4 8
Max. pulse width: 10 µs 10 µs
Rise time: ≤ 1 ns ≤ 3 ns
Droop (max): ≤ 5%
Dimensions:
(H x W x D) 43 mm x 76 mm x 76 mm
(1.7” x 3.0” x 3.0”)
Connectors: In: BNC
Out: 1 cm microstrip PCB
101
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ACCESSORIES (POWER SPLITTERS, POWER COMBINERS, ATTENUATORS, TEST LOADS, ADAPTERS, CABLES)
