# 18 – 110 GHz ISOLATORS

## _Features_

· Models from 18–110 GHz
· Low Insertion Loss
· Good Temperature Performance
· Small Size
· Low Cost

## _Specifications_

· H-Plane, Y-Junction devices
· Operating Temperature: -10 to +60°C (MI10599: -10 to +50°C)

_Model Table_

|Model No.|Frequency (GHz)|Waveguide|Flange|Bandwidth (%)|Isolation (dB)|Insertion Loss|SWR (In & Out)|Max. Average Power (Watts)
|MMI42595T|18.0–26.5|WR-42|UG595/U|10|20|0.3|1.30|40
|MMI28599T|26.5–40.0|WR-28|UG599/U|10|20|0.4|1.30|30
|MMI22599T|33.0–50.0|WR-22|UG599/U-M|8|20|0.5|1.30|20
|MMI19599T|40.0–60.0|WR-19|UG599/U-M|7|18|0.6|1.35|5
|MMI10599T|75.0–110.0|WR-10|UG599/U-M|2|18|0.7|1.30|0.2

## _Waveguide Dimensions (IN/MM)_

Waveguide Size	A	B	C	D	E
WR-42	0.75/19.1	1.50/38.1	0.90/22.9	0.45/11.4	0.45/11.4
WR-28	0.50/12.7	1.25/31.8	0.75/19.1	0.38/9.7	0.38/9.7
WR-22	0.50/12.7	1.25/31.8	0.75/19.1	0.38/9.7	0.38/9.7
WR-19	0.50/12.7	1.25/31.8	0.75/19.1	0.38/9.7	0.38/9.7
WR-10	1.00/25.4	1.20/30.5	0.90/22.9	0.45/11.4	0.50/12.7

## _Ordering Information_

· MMI isolator part numbers indicate center frequency, waveguide size, and flange type.
· Through-hole flange part numbers end with no trailing character (e.g., MMI22599).
· Example: MMI22599T (33.5 GHz, WR22 waveguide, UG599/U-M flange).