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Dielectric Resonator Oscillators

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RESOTECH's fundamental frequency freerunning Dielectric Resonators (DROs) operate at frequencies from 2.8 to 14 GHz over -54 to +85°C.

RESOTECH offers electrically tuned DROs with features that are unmatched in the industry. An electrical tuning range of up to 2% is available with excellent phase noise performance. The standard electrical tuning range option is 0.2-0.3%. A tuning linearity of better than 2:1 is available. All of RESOTECH's DROs feature a mechanical tuning range of 3-4% and 0.001% tuning resolution. Mechanical tuning stops are provided to prevent damage of the dielectric resonator.

All GaAs FET DROs (4 to 13 GHz) incorporate a voltage regulator (with reverse polarity and over-voltage protection) which makes the DRO performance insensitive to power supple voltage level (+8 to + 18 VDC).

RESOTECH welcomes any custom design request and can provide the necessary expertise, experience, and fast turnaround to meet your special requirements.

page 1

4.0 to 7.9 GHz DROs with or without Internal Isolator

Guaranteed Specifications over -30 to +70°C.


Circuit Configuration

Operating Frequency
Mechanical
  Tuning Range
  Tuning Resolution
Electrical
  Tuning Range 1
  Tuning Voltage 2
Output Power @ +25°C  3
Output Power Variation
  Over 0 to +60°C
  Over -30 to +70°C
Frequency Stability
2nd Harmonic
Spurious
Frequency Pushing
Frequency Pulling 1.5:1 VSWR
Frequency Pulling 2.5:1 VSWR

Phase Noise, Single Sideband
  1HZ Bandwidth @ 7 GHz
    10 KHz from carrier
    100 KHz from carrier
Input Power
  Voltage
  Current
Weight
Size
Finish

Without
Isolator

4.0-7.9

3.0
100

0.2-0.3
0 to +30
+14.5

±0.6
+1.0/-1.3
5
-18
-80
10
±3




-90
-120

+8 to +18
65
52
1.96x1.20x0.63
Nickel Plated

With
Isolator

5.0-7.9

3.0
100

0.2-0.3
0 to +30
+14.0

±0.6
+1.0/-1.3
5
-18
-80
10

±250



-90
-120

+8 to +18
65
65
2.52x1.20x0.63
Nickel Plated




GHz

%Typ.
KHz Typ.

% Min.
VDC Max.
dBm Min.

dB Typ.
dB Typ.
ppm/°C Max.
dBc Min.
dBc Min.
KHz/V Typ.
MHz Max.
KHz Max.



dBc Typ.
dBc Typ.

VDC
mA Max.
g Typ.
Inches

page 2

8 to 13 GHz DROs with Internal Isolator

Guaranteed Specification over -30 to +70°C.



Operating Frequency
Mechanical
  Tuning Range
  Tuning Resolution
Electrical
  Tuning Range 1
  Tuning Voltage 2
Output Power @ +25°C  3
Output Power Variation
  Over 0 to +60°C
  Over -30 to +70°C
Frequency Stability
2nd Harmonic
Spurious
Frequency Pushing
Frequency Pulling  2.5:1 VSWR
Phase Noise, Single Sideband
  1HZ Bandwidth @ 10 GHz
    10 KHz from carrier
    100 KHz from carrier
Input Power
  Voltage
  Current
Weight
Size
Finish

Basic Model

8-13

3.0
150

0.2-0.3
0 to +30
+14

±0.6
+1.0/-1.3
5
-20
-80
10
±400


-85
-115

+8 to +18
65
43
1.92x1.05x0.53
Nickel Plated



GHz

%Typ
KHz Typ.

% Min.
VDC Max.
dBm Min.

dB Typ.
dB Typ.
ppm/C Max.
dBc Min.
dBc Min.
KHz/V Typ.
KHz Max.


dBc Typ.
dBc Typ.

VDC
mA Max.
g Typ.
Inches

Notes:

Electrical tuning ranges of up to 1.0 % at X-Band and up to 2.0% at S-Band are available.
The standard tuning voltage range is 0 to +30V. For models with improved linearity (< 2:1) the tuning range is 0 to +22V.
+20dBm min output power is optional.

ORDERING INFORMATION

E: Electrical Tuning
M: Mechanical Tuning
(all models)
I: Internal Isolator

Examples:

DRO-8700-MI Mechanically tuned 8.7 GHz DRO
DRO-10330-EMI Electrically and Mechanically tuned 10.3 GHz DRO

page 3

Application Notes

For manual electrical tuning applications of RESOTECH's DROs, an RC filter is recommended as shown in Fig. 1 to prevent phase noise degradation due to parasitic modulation by power supple ripples and/or low frequency interference.

RESOTECH's DROs have negligible pushing due to an internal voltage regulator. This feature facilitates manual electrical tuning with a single power supply as shown in Fig. 2. At room temperature, the voltage tuning range is +6 to +25 V for a basic model and +6 to +18 V for a high stability model.

In order to fully utilize RESOTECH's mechanical tuning, capability with good frequency resolution, the housing of the tuning element should be used for course tuning and the piston/rotor for fine adjustment.
When adjusting the tuning element housing, the piston/rotor must be set near the top of the housing, but not lower than 0.5mm from the top.
When securing the tuning element, do not over tighten.

page 4

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