MITSUMI
Helical Filters
HF Series
OUTLINE
Helical filters in HF series comprise band-pass
filters designed to be applied to automobile
telephones, cordless telephones and various
communication equipments.
Two or three 5mm square, 7mm square or 10mm
square coils, as the base, can be combined to
acquire a variety of optional band-pass filter
characteristics.
Coils, Filters
HF-H5-AD
HF-H7-AD
HF-H7-AT
SPECIFICATIONS
HF-H5-AT
HF-H14
HF-H20-A
HF-H30-A
HF-H21
Models
Construction
Operation frequency
Remark
HF-H5-AD
5 Double
230~600MHz
HF-H5-AT
5 Triple
230~600MHz
HF-H7-AD
7 Double
600~1200MHz Low
profile
HF-H7-AT
7 Triple
600~1200MHz Low
profile
HF-H14
7 Double
150~1000MHz
HF-H21
7 Triple
150~1000MHz
HF-H20-A
10 Double
500~1200MHz
HF-H30-A
10 Triple
500~1200MHz
MITSUMI
CHARACTERISTICS (EXAMPLE)
Helical Filters
HF-H7-AD
0
-5
-10
-15
-20
-25
-30
-35
-40
450 460 470 480 490 500 510 520 530 540 550
Attenuation (dB)
Frequency (MHz)
Terminal Connection & Test Circuit (Bottom View)
HF-H7-AT
0
-10
-20
-30
-40
-50
-60
-70
-80
800 820 840 860 880 900 920 940 960 980 1000
Attenuation (dB)
Frequency (MHz)
Terminal Connection & Test Circuit (Bottom View)
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