Miniature Ferrite Isolators
TM
®
18
–
110 GHz ISOLATORS
Features
●
●
●
●
●
Models from 18–110 GHz
Low Insertion Loss
Good Temperature Performance
Small Size
Low Cost
Description
Microsemi’s Miniature Ferrite Isolators are H-Plane, Y-
Junction
devices
with
similar
performance
specifications to standard size isolators. Models are
available in bands covering center frequencies from
18–110 GHz and feature low insertion loss and high
isolation within the specified bandwidth.
MMI series isolators are useful in improving the
stability of microwave oscillators and amplifiers by
projecting matched impedance across the frequency and
preventing reverse and reflected power from adversely
affecting performance.
Specifications @ 25°C
Model
No.
MMI42595T
MMI28599T
MMI22599T
MMI19599T
MMI10599T
Freq.
GHz
18.0–26.5
26.5–40.0
33.0–50.0
40.0–60.0
75.0–110.0
Waveguide
WR-42
WR-28
WR-22
WR-19
WR-10
Flange
UG595/U
UG599/U
UG599/U-M
UG599/U-M
UG599/U-M
Min.
Bandwidth
(%)
10
10
8
7
2
Min.
Isolation
(dB)
20
20
20
18
18
Max.
Insertion
Loss
0.3
0.4
0.5
0.6
0.7
Max.
SWR
(In & Out)
1.30
1.30
1.30
1.35
1.30
Max. Average Power
(Watts)
Forward
Reverse
40
30
20
5
0.2
1.0
1.0
0.8
0.5
0.2
Operating temperature range: -10 to +60°C except: -10°C to +50°C for MI10599.
Copyright 2008
Rev: 2008-11-04
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978 -442-5600, Fax: 978-937-3748
Page 1
Miniature Ferrite Isolators
TM
®
18
–
110 GHz ISOLATORS
C
D
A
Ordering Information
.
Model
Number
MMI
28
599
T
E
B
Model
W/G size
Flange
Threaded
Flange
Holes
M3 Thread Thru From
One Side Only
4 Places
WAVE-
GUIDE
SIZE
WR-42
WR-28
WR-22
WR-19
WR-10
A
IN/MM
0.50/12.7
0.50/12.7
0.50/12.7
B
IN/MM
125/31.8
125/31.8
125/31.8
C
IN/MM
0.75/19.1
0.75/19.1
0.75/19.1
D
IN/MM
0.38/9.7
0.38/9.7
0.38/9.7
E
IN/MM
0.45/11.4
0.38/9.7
0.38/9.7
0.38/9.7
0.50/12.7
MMI isolator part numbers are designated by indicating
the center frequency and waveguide size and flange type.
For example, the MMI22599T at 33.5 GHz indicates
WR22 waveguide, UG599/U-M flange with threaded
holes at 33.5 GHz center frequency. For a through-hole
flange the part number is MMI22599.
0.75/19.1 1.50/38.1
090/22.9 0.45/11.4
1.00/25.4 1.20/30.5 0.90/22.9 0.45/11.4
Copyright 2008
Rev: 2008-11-04
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978 -442-5600, Fax: 978-937-3748
Page 2