4

4 - 14

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

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HMC137

GaAs MMIC BI-PHASE

MODULATOR, 6 - 11 GHz

v03.0304

General Description

Features

Functional Diagram

Chip Integrates Directly into MIC Designs

Carrier Suppression: 20 dB

Direct Modulation in the 6 - 11 GHz Band

Functions also as a Phase Detector

Die Size: 1.45 x 1.30 x 0.1 mm

Typical Applications

The HMC137 is suitable for:

• Wireless Local Loop

• LMDS & VSAT

• Point-to-Point Radios

• Test Equipment

The HMC137 Bi-Phase Modulator is designed to

phase-modulate an RF signal into reference and 180

degree states. Device input is at the RF port and out-

put is at the LO port. The polarity of the bias current

at the control port (IF port) defines the phase states.

Excellent amplitude and phase balance provided by

closely matched monolithic balun and diode circuits

delivers 20 dB of carrier suppression in a tiny mono-

lithic chip.

The device also functions as a demodulator or phase

comparator. As a demodulator, data emerges at the

control port when a modulated signal at the RF port

is compared to a reference signal at the LO port. As a

phase comparator, the phase angle between two sig-

nals applied to the RF and LO ports is represented

by an analog voltage at the control port. Except for

carrier suppression, the data presented here was

measured under static conditions in which a DC bias

current (nominally 5 mA) is applied to the control port.

Parameter

Min.

Typ.

Max.

Units

Frequency Band

6 - 11

GHz

Insertion Loss

911

dB

Return Loss, RF and LO Ports

2.5

3.0

dB

Amplitude Balance

0.25

0.50

dB

Phase Balacne

10

15

deg

Carrier Suppression (When driven with a 1 MHz square wave, 1.4 Vp-p)

15

20

dBc

Input Power for 1 dB Compression

4

8

dBm

Third Order Intercept, Input

10

15

dBm

Second Order Intercept, Input

25

40

dBm

Bias Current (Bias current forward biases internal Schottky diodes providing approximately 0.6 V at

the control port).

25

10

mA