CHV2241 データシートの表示（PDF） - United Monolithic Semiconductors

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CHV2241

K-band Oscillator with integrated Q-band Harmonic Mixer

United Monolithic Semiconductors 

CHV2241

K-band Oscillator / Q-band Mixer

Proposed external high Q resonator

This chip has been especially designed to be coupled to a high Q dielectric

resonator (For example typical Q. @ 10 GHz=24000 for MURATA

/DRD036EC016). The resonance is given by a dielectric cylinder coupled to a

50Ω line. The size of the resonator gives the centre frequency and the space

between the resonator and the line gives the loaded quality factor. The following

drawing shows an example of external configuration. As it is the assembly of a

test fixture all the biases are used and the auxiliary LO output is connected.

However, for a fixed application the configuration given in the previous section

can by applied.

Alumina substrate : thickness=250µm

Dielectric

resonator

50 Ohm resistance

3l

d

via hole 2l

Additional information

n Resonator reference example = MURATA /DRD036EC016. Other

kind of resonators can be used (from TEKELEC or TRANS-TECH).

The temperature coefficient has to be chosen according to the

environment.

n Temperature drift : For example, in the –40 to +100°C temperature

range, the frequency drift @ 38GHz is 12 MHz with the MURATA /

DRD036EC016 resonator.

n Resonator coupling : d=0.3mm , l=1.5mm. These values have been

used in the test fixture, of course they can be modified if the

environment is different.

n 50Ω line width on alumina (heigth=0.25mm) = 0.238mm

n Cavity size (mm) : 18 x 17 x 7

Ref. : DSCHV22411074 -15-Mar.-01

6/8

Specifications subject to change without notice

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