Microwave Trimmer Capacitors
Series MTR
This microwave trimmer range provides fast accurate
fine tuning for variety of R.F and microwave appli-
.
cations. The variety of ten lead configurations provide
for series and parallel stripline and microwave cavity
applications. The MTR capacitors feature an extended
life drive mechanism which gives constant torque, and
confers exceptionally high resistance to shock and
vibration.
p
p
p
p
p
High Self Resonance
Ten Lead style configuration
Small Size
Robust Construction
-65°C to + 125°C
Technical Data
Dielectric:
Sapphire
Terminals:
Gold plated brass.
Temperature Range:
-65°C to + 125°C
Capacitance Range:
0.3 - 1.2 pF
0.4 - 2.5 pF
0.6 - 4.5 pF
0.8 - 8.0 pF
Capacitance Temperature Coefficient
:
Option A : + 350
±
75 ppm/°C
Option B : + 50
±
50 ppm/°C
Option C : 0
±
50 ppm/°C *
Option D : 0
±
75 ppm/°C
*
Not available for 8pF trimmers
Tuning Torque:
0.1 - 1.0 ounce inch (0.7 - 7mN.m)
for 1.2 pF trimmers
0.2 - 2.0 ounce inch (1.4 - 14mN.m) for 2.5, 4.5
and 8.0pF trimmers
'Q'
See Tables: 1 - 10
D.C.Working Voltage:
500V
Insulation Resistance:
> 10
4
Megohms at 500V d.c.
Dielectric Test Voltage:
1,000V d.c.
Power Rating:
25W C.W. at 1 GHz
Performance Curves:
See Page 20
Self resonant frequency:
See Tables 1 - 4
For ordering information see page 20
MTR Styles
MTR0XX
MTR1XX
MTR2XX
MTR3XX
MTR4XX
MTR5XX
MTR9XX
19
Microwave Trimmer Capacitors
Series MTR
Perfomance Curves
Measurement in 7mm Coaxial 50 Ohm impedance test
fixture in HP 8410A network analyzer system
Component Reactance vs Frequency
pF
pF
pF
pF
pF pF
0.4
8.0 4 4.5 2 2.5 8 0.8 4 0.6
2
8
XX
XX XX RXX RXX RXX
TR
T
T
T
T R TR
M
M
M
M
M M
0
Component Reactance (ohms)
Component Reactance (ohms)
Component Reactance vs Frequency
0
0.3pF
9
8
Capacitance rotation Characteristics
of Microtrim Capacitors
MTRX08
Capacitance (pF)
5.0
5.0
1.2pF
MTRXX1
100
7
6
5
MTRX04
4
3
2
1
MTRX02
MTRX01
100
150
0
2
4
6
150
8
10
12
14
2
4
6
8
10
12
14
Frequency (GHz)
Frequency (GHz)
2
4
6
8
10
12
14
16
18
Number of Rotor Screw Turns
Self Resonant Frequency vs Capacitance
14
Self Resonant Frequency (GHz)
12
10
8
MTRXX2
6
4
2
0
1
2
3
4
5
6
7
8
9
10
6
0.2
Capacitance (pF)
MTRXX4
MTRXX8
Self Resonant Frequency (GHz)
12
14
Self Resonant Frequency vs Capacitance
MTRXX1
10
8
0.4
0.6
0.8
1.0
1.2
Capacitance (pF)
Ordering Information
MTR
4
2
8
B
WL
Series
Lead & Mounting
Configuration
Tables 1-10
Style Table 1-10
Max. Capacitance
to nearest pF
Tables 1-10
Temperature
coefficient
(see Technical
Data)
Specifies option of
non- standard
lead size on types
MTR1XX and
MTR2XX of 0.01 x
0.09 (0.25 x 2.4)
20
Microwave Trimmer Capacitors
Series MTR-X21
Lead configuration and dimensions
Table-1
Tuning capacitance range: 0.3-1.2
p
F
Q-factor @250MHz min: 5000
Part
designation
Outline drawing and dimensions in
inches (mm)
Tuning Torque: 0.1-1.0 ounce inch (0.7-7 mN. m)
Self resonant frequency: 13GHz
Part
designation
Outline drawing and dimensions in
inches (mm)
MTR021
MTR421
MTR121
MTR521
MTR221
MTR921
MTR321
NOTE:
1) Tolerance on stator diameters 0.075 (1.9) are
±0.004
(±0.1) all other tolerances
±0.016
(±0.4)
2) Dimensions of screwdriver slot (tuning): 0.012x0.045 (0.3x1.14)
3) All dimensions are in inches (mm)
For Ordering Information See page 20
21
Microwave Trimmer Capacitors
Series MTR-X22
Table-2
Tuning capacitance range: 0.4-2.5
p
F
Q-factor @250MHz min: 4000
Tuning Torque: 0.2-2.0 ounce inch (1.4-14 mN. m)
Self resonant frequency: 11GHz
Part
designation
Outline drawing and dimensions in
inches (mm)
Part
designation
Outline drawing and dimensions in
inches (mm)
MTR022
MTR422
MTR122
MTR522
MTR222
MTR922
0.20
5.2
MTR322
NOTE:
1) Tolerance on stator diameters 0.118 (3.0) are
±0.004
(±0.1) all other tolerances
±0.016
(±0.4)
2) Dimensions of screwdriver slot (tuning): 0.016x0.080 (0.4x2.0)
3) All dimensions are in inches (mm)
For Ordering Information See page 20
22
Microwave Trimmer Capacitors
Series MTR-X24
Table-3
Tuning capacitance range: 0.6-4.5
p
F
Q-factor @250MHz min: 3000
Tuning Torque: 0.2-2.0 ounce inch (1.4-14mN.m)
Self resonant frequency: 8GHz
Part
designation
Outline drawing and dimensions in
inches (mm)
Part
designation
Outline drawing and dimensions in
inches (mm)
MTR024
MTR424
MTR124
MTR524
MTR224
MTR924
MTR324
NOTE:
1) Tolerance on stator diameters 0.118 (3.0) are
±0.004
(±0.1) all other tolerances
±0.016
(±0.4)
2) Dimensions of screwdriver slot (tuning): 0.016x.080 (0.4x2.0)
3) All dimensions are in inches (mm)
For Ordering Information See page 20
23
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