5

5 - 9

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

Alternate Applications:

Frequency Multiplier Performance

Voltage Detector, Built-In-Test (B.I.T.)

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0

1

2

3

4

5

10

15

20

25

30

35

40

10 dBm

15 dBm

18 dBm

OUTPUT FREQUENCY (GHz)

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

10

12

14

16

18

20

22

18 GHz

22 GHz

28 GHz

38 GHz

OUTPUT POWER (dBm)

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

10

12

14

16

18

20

22

OUTPUT POWER (dBm)

-55 C

+85 C

+25 C

HMC283LM1 can also perform as a frequency multiplier.

This is accomplished by biasing Vg1 into its pinchoff region

- typically -1V to -2V. By adjusting the Vg1 bias, the device

will operate as a doubler or tripler.

Vg2 may also be

adjusted to minimize the levels of unwanted harmonics.

The plot shows the performance of HMC283 operated as

a doubler with Vg1 = -1V and the remaining gate voltages

(Vg2, 3, 4) set to -0.15V. In this condition the amplifier

draws 310mA at 3.5V drain bias (Vdd) and provides +5dB

to -5dB conversion loss dependent upon the output fre-

quency.

By connecting the Vdet port to a 10k Ohm resistor and monitoring the voltage, a B.I.T. circuit can be created to monitor

changes in the device output power. This circuit is extremely well compensated for temperature variations as shown

in the first plot. The detected voltage does change with frequency and the second plot shows its variation.

HMC283LM1

SMT MEDIUM POWER GaAs MMIC

AMPLIFIER, 17 - 40 GHz

v04.1201