Wide Matching Range Slide Screw Tuners: Data S H E E T / 2 G - 0 3 5

Wide Matching Range
Slide Screw Tuners

D ATA S H E E T / 2 G - 0 3 5
// JANUARY 2018
Wide Matching Range
Slide Screw Tuners
SERIES MST981, MST982, MST983 & MST984
MST982E35
Features General Information determines the phase. While there is

some interaction, the effects are almost
>> Slab-line Transmission Structure Maury manual tuners are based on independent of each other.
precision slide screw technology that
>> Dual Probes for Improved Matching
utilizes broadband slab line transmission Functional Description
Characteristics
structure and passive probes to create
>> LCD Readout for Carriage Position impedances for devices. The probes are The dual probe structure in Maury coaxial
designed to be very close to one-quarter slide screw tuners is designed so that
wavelength in the linear dimension at the one probe (low frequency) covers the
mid-band of each range. Since each tuner range from the lowest frequency to the
has two probes, this results in improved crossover frequency listed in the Available
matching characteristics for each unit. Models table on page 2. The second
Another key feature of this series of probe (high frequency) covers the range
tuners is the inclusion of a LCD position from the crossover frequency to the
readout of the carriage position on those tuner's maximum rated frequency. The
units operating below 18 GHz. Higher optimum crossover frequency varies from
frequency tuners utilize a micrometer tuner to tuner.
carriage drive. These are indicated in the
As each micrometer-driven probe is
Available Models table on page 2.
introduced into the slab-line transmission
The positional repeatability and high structure it induces a mismatch in its
matching range of these tuners make frequency range. The magnitude of this
them ideally suited for use as a variable impedance mismatch is determined by
impedance source in applications the probe position (depth); the closer the
like device characterization. Such probe approaches the center conductor,
measurements depend upon the ability the greater the magnitude. The phase of
of the tuner to establish impedances out the impedance mismatch is determined
near the edge of the Smith Chart and to by the carriage position along the slab-
reproduce the electrical characteristics line. The probes operate independently
as a function of mechanical position. The of each other with little or no interaction.
tuners in this series are also easy to use Each probe will meet its specifications
due to the nearly independent electrical over its rated frequency range, and
results of the mechanical motions. The typically has considerably higher matching
depth of penetration of the probe into capability in the middle of its band.
the transmission line determines the Figure 1 shows responses that are typical
magnitude of the reflection, while the of those seen in a low frequency/high
position of the probe along the line frequency pair of probes.
M A U R Y M W. C O M / D ATA S H E E T / 2 G - 0 3 5
1
Available Models
Frequency VSWR Maximum Loss Probe Dimension
Connector Power Handling 1 “A”
Model Range Matching (Probes Crossover
Type (Ave/Peak Watts)
(GHz) Range Retracted) Frequency Inches (CM)
MST981BN Type N 4 250/2500
0.4 – 4.0 25:1 0.2 dB 1.4 GHz 14.75 (37.47)
MST981B35 3.5mm 3 125/1250
MST981EN Type N 4 250/2500
0.8 – 8.0 35:1 0.2 dB 2.8 GHz 7.37 (18.72)
MST981E35 3.5mm 3 125/1250
MST982VN Type N 4 50/500
0.6 – 8.0 20:1 0.5 dB 2.8 GHz 9.83 (24.97)
MST982V35 3.5mm 3 25/250
MST982BN Type N 4 50/500
0.8 – 18.0 10:1 0.6 dB 4.6 GHz 7.37 (18.72)
MST982B35 3.5mm 3 25/250
MST982AN Type N 4 50/500
1.8 – 18.0 12:1 0.4 dB 5.5 GHz 3.28 (8.33)
MST982A35 3.5mm 3 25/250
MST983B35 12.0 – 34.0 3.5mm 3, 5 10:1 0.7 dB 16.0 GHz 15/150 0.49 (1.24)
MST984A24 12.0 – 50.0 2.4mm 2, 5 10:1 1.0 dB 21.5 GHz 15/150 0.49 (1.24)
1
Within rated matching range. 3
Precision 3.5mm per Maury data sheet 5E-062. 5
Non LCD readout model, micrometer-driven
2
Precision 2.4mm per Maury data sheet 5E-064. 4
Precision type N per Maury data sheet 5E-049. carriage.
Typical Responses
Figure 1. Typical responses seen in low
frequency and high frequency probes as they
are used in Maury coaxial slide screw tuners.
Typical Dimensions
Models with LCD readouts for carriage position. Models with micrometer-driven
Note: The replacement battery for the LCD is a Duracell® 76S. carriage blocks.
Figure 2. Typical dimensions for Maury slide

screw tuners. See the Available Models table
for model-specific dimensions (“A” reference).
M A U R Y M W. C O M / D ATA S H E E T / 2 G - 0 3 5
2
VISIT OUR WEB STORE
TO LEARN MORE ABOUT
OUR PRODUCTS
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____
D ATA S H E E T / 2 G - 0 3 5
© 2018 Maury Microwave Corporation. All Rights Reserved.
Specifications are subject to change without notice.
Maury Microwave is AS9100D & ISO 9001:2015 Certified.
C O N TA C T U S :
W / maurymw.com
E / maury@maurymw.com
P / +1-909-987-4715
F / +1-909-987-1112
2900 Inland Empire Blvd
Ontario, CA 91764

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Wide Matching Range

Slide Screw Tuners

Features General Information determines the phase. While there is

Figure 2. Typical dimensions for Maury slide

TO LEARN MORE ABOUT

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