Microwave Materials
D6
This is a low permittivity material that is used
predominantly for supports for dielectric resonators however it can be used effectively for substrate
applications and also for GPS patch antenna applications.
[Characteristics and Typical Applications]
D9
A high purity (99.5%) Alumina ceramic material ideal for
demanding low loss applications, such as Base Station Filters.
[Characteristics and Typical Applications]
D20
Morgan Electro Ceramics D20 material is the lowest
 temperature stabilised material that we manufacture.
Developed primarily for coaxial resonator and GPS Patch Antenna solutions the material provides a cost
effective solution for these applications.
[Characteristics and Typical Applications]
D34
Morgan Electro Ceramics D34 material is a
cost effective dielectric composition with
of 35 and an achievable Qo of greater than 40,000 at 2.0 GHz. The material also provides an
exceptionally linear thermal response.
[Characteristics and Typical Applications]
D36
Morgan Electro Ceramics D36 material is available for puck, coaxial and patch antenna components. Widely used in many applications the material
provides a cost effective solution with good Q and almost linear thermal response.
[Characteristics and Typical Applications]
D43
Morgan Electro Ceramics D43 material is a high
dielectric composition
with Qo typically 30,000 at 0.9 GHz and 22,000 at 2.0 GHz.
[Characteristics and Typical Applications]
D77
Morgan Electro Ceramics D77 ceramic material is one of our higher
materials with a good Q value. The material is particularly useful where optimum miniaturisation is required. The material has a slightly
positive non-linearity coefficient which may be useful for thermal compensation.
[Characteristics and Typical Applications]
D88
Morgan Electro Ceramics D88 material offers our highest
solution. The material offers maximum miniaturisation whist still offering a temperature coefficient that is tuneable through zero.
[Characteristics and Typical Applications]
Summary of Material Properties
Values shown in table are typical
| Material
Type |
D6 |
D9 |
D20 |
D34 |
D36 |
D43 |
D77 |
D88 |
| Composition |
Steatite |
Alumina
99.5% |
CaMgTi |
BaZn
CoNb |
ZrTiSn |
ZrZn
TiNb |
BaSmTi |
BaNdTi |
εr
at
0pmmC-1 |
6.5±0.5 |
9.8±0.5 |
20±1 |
35.5±1.5 |
37±1 |
43±2 |
76.5±2 |
88±2 |
QO at
specified
frequency * |
Tan δ
0.002 |
Tan δ
<0.0001 |
6000@
12GHz |
43,000@
2GHz |
21,000@
2GHz |
22,000@
2GHz |
1750@
6GHz |
1100@
5GHz |
TCF range
available
(ppm°C-1) |
- |
- |
-12 to+12 |
-6 to+6 |
-4 to+15 |
-3 to+9 |
0 to+12 |
-6 to+9 |
TCF
tolerance
(ppm°C-1) |
- |
- |
±1 |
±1 |
±1 |
±2 |
±2 |
±5 |
Non Linearity
Co-efficient
(ppm°C-2) |
- |
- |
-0.09 |
-0.004 |
-0.01 |
-0.02 |
+0.02 |
-0.12 |
Thermal
Expansion
Co-efficient
(ppm°C-1) |
8.5 |
8.5 |
8.0 |
|
7.4 |
|
|
8 |
Thermal
Conductivity
(Wm-1 K-1) |
2.9 |
25.6 |
7.0 |
2.0 |
2.0 |
2.0 |
|
1.6 |
Density
(gcm-3) |
3.0 |
3.89 |
3.7 |
6.60 |
5.1 |
4.85 |
5.6 |
5.8 |
Moisture
Absorption |
<0.01% |
<0.01% |
<0.01% |
<0.01% |
<0.01% |
<0.01% |
<0.01% |
<0.01% |
Terms:
| εr |
Relative Permittivity |
| QO |
Quality Factor (unloaded) |
| TCF |
Temperature Coefficient of Resonant Frequency |
| Non Linearity Co-efficient |
Deviation of TCF from linear response with temperature in ppm°C-2
(Note this must be taken into account when determining TCF requirements.) |
The above electrical material characteristics all form part of the materials qualification process at Morgan
Electro Ceramics prior to materials being released for manufacturing use.
|
