HIGH FREQUENCY DEVICES
DIELECTRIC RESONATORS–DRD & DRT
U Series
GENERAL CHARACTERISTICS
ꢀ High unloaded Q — 6,000 min. at 7GHz.
ꢀ High dielectric constant — ꢁr ꢀ 38.
ꢀ Resonant frequency temperature coefficient from –4 to
+10ppm/°C.
ꢀ Accurate and repeatable dielectric constant ( 0.5).
ꢀ Improved spurious response (spurious modes are further
removed from fundamental resonant frequency).
ꢀ Decoupled mounting on supports above substrate
maximizes operational Q.
DIMENSIONS & FREQUENCY RANGE
Dr ± ±.±ꢀ
Lr ± ±.±ꢀ
Frequency
Part Number
(mm)
(mm)
Range* (GHz)
DRD±46Uꢀ±21
DRD±ꢀ1Uꢀ±22
DRD±ꢀꢀUꢀ±24
DRD±6±Uꢀ±27
DRD±6ꢀUꢀ±29
DRD±71Uꢀ±31
DRD±77Uꢀ±34
DRD±84Uꢀ±37
DRD±91Uꢀ±4±
DRD±99Uꢀ±44
DRD1±7Uꢀ±48
DRD117Uꢀ±ꢀ2
DRD127Uꢀ±ꢀ6
DRD138Uꢀ±61
DRD1ꢀ±Uꢀ±67
DRD163Uꢀ±72
DRD178Uꢀ±79
DRD193Uꢀ±88
DRD21±Uꢀ±93
DRD228Uꢀ1±1
DRD248Uꢀ11±
DRD27±Uꢀ12±
DRD293Uꢀ13±
DRD319Uꢀ142
DRD347Uꢀ1ꢀ4
4.65
5.06
2.08
2.24
2.44
2.65
2.88
3.14
3.41
3.71
4.03
4.38
4.77
5.18
5.63
6.13
6.66
7.24
11.46 to 12.45
10.54 to 11.45
9.69 to 10.53
8.91 to 9.68
8.20 to 8.90
7.54 to 8.19
6.93 to 7.53
6.38 to 6.92
5.87 to 6.37
5.40 to 5.86
4.96 to 5.39
4.56 to 4.95
4.20 to 4.55
3.86 to 4.19
3.55 to 3.85
3.27 to 3.54
3.00 to 3.26
2.76 to 2.99
2.54 to 2.75
2.34 to 2.53
2.15 to 2.33
1.98 to 2.14
1.82 to 1.97
1.67 to 1.81
1.54 to 1.66
CONFIGURATION
5.50
5.98
Dr
6.50
Dr
dr
7.07
7.69
8.36
Lr
Lr
9.09
9.88
10.75
11.68
12.70
13.81
15.02
16.33
17.76
19.31
21.00
22.83
24.82
26.99
29.35
31.91
34.70
DRT
DRD
Copper
Cavity
Do
Dr
7.88
8.56
9.31
10.13
11.01
11.97
13.02
14.15
15.39
Resomics
Support
Lr
Lo
Ls
TABLE 1: Q & ꢀf
Dielectric
Constant
ꢀr (±±.ꢀ)
Unloaded
Q
(at 7GHz)
Type
Tempꢀ. Cf oeff.
DIMENSIONS & FREQUENCY RANGE
(ppm/°C)
Dr ± ±.±ꢀ dr ± ±.1 Lr ± ±.±ꢀ
Frequency
Part Number
A
B
C
D
E
–4
–2
0
36.6
37.0
37.4
37.7
38.0
38.3
38.6
38.9
(mm)
5.06
5.50
(mm)
(mm)
2.24
2.44
Range* (GHz)
DRT±ꢀ1U±2±ꢀ±22
10.54 to 11.45
9.69 to 10.53
2.65 8.91 to 9.68
2.88 8.20 to 8.90
____________________________
_______________________
DRT±ꢀꢀU±2±ꢀ±24
____________________________
_______________________
2
6000 min.
DRT±6±U±2±ꢀ±27 5.98
____________________________
_______________________
2.0
4
DRT±6ꢀU±2±ꢀ±29 6.50
____________________________
DRT±71U±2±ꢀ±31 7.07
_______________________
3.14 7.54 to 8.19
F
6
____________________________
DRT±77U±2±ꢀ±34 7.69
DRT±84U±3±ꢀ±37 8.36
_______________________
3.41 6.93 to 7.53
3.71 6.38 to 6.92
G
H
8
10
____________________________
DRT±91U±3±ꢀ±4± 9.09
_______________________
4.03 5.87 to 6.37
____________________________
_______________________
3.0
DRT±99U±3±ꢀ±44 9.88
4.38 5.40 to 5.86
____________________________
DRT1±ꢀU±3±ꢀ±46 10.50
DRT1±7U±4±ꢀ±48 10.75
_______________________
4.60 5.08 to 5.51
4.77 4.96 to 5.39
100,000
2.0 x fo + 2.6
fo = [GHz]
Q can be approximated by:
Q ≥
____________________________
DRT117U±4±ꢀ±ꢀ2 11.68
_______________________
5.18 4.56 to 4.95
____________________________
_______________________
DRT127U±4±ꢀ±ꢀ6 12.70
5.63 4.20 to 4.55
6.13 3.86 to 4.19
____________________________
_______________________
DRT138U±4±ꢀ±61 13.81
____________________________
DRT1ꢀ±U±4±ꢀ±67 15.02
_______________________
6.66 3.55 to 3.85
4.0
6.0
____________________________
DRT163U±4±ꢀ±72 16.33
_______________________
7.24 3.27 to 3.54
TABLE 2: ꢀf TOLERANCE
Identification
____________________________
_______________________
ꢀ Tol. (ppm/°C)
f
DRT178U±4±ꢀ±79 17.76
7.88 3.00 to 3.26
8.56 2.76 to 2.99
____________________________
_______________________
—
A
B
2
1
0.5
DRT193U±4±ꢀ±86
19.31
20.00
20.00
____________________________
_______________________
DRT2±±U±4±ꢀ±86
DRT2±±U±4±ꢀ±86
8.63
8.63
2.67 to 2.89
2.66 to 2.88
Note: *Frequency is measured under the condition: Lr/Lo = 0.33.
PART NUMBERING
DRT
055
U
020
ꢀ
024
A
ꢀ
ꢀ
ꢀ
DRD = disk type
DRT = cylindrical type
Outside diameter Material
(Dr) type
Inside diameter
ꢀ (Resonant Freq., T.C.)
Thickness
(Lr)
ꢀ tolerance
f
f
(dr) for DRT only as shown in Table 1
as shown in Table 2
ꢀNote: For actual dimension in mm, divide number by 10.
292
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