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TECHNICAL DATA SHEET

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inventory and certifications: 60 GHz Receiver (Rx) Waveguide Module PEM002

PEM002

60 GHz Receiver (Rx) Waveguide Module

PEM002 REV

Receiver Architecture

The PEM002 receiver uses a double conversion superheterodyne architecture with a sliding IF. The IF frequency is at 1/7 the

RF carrier frequency, and the VCO is at 2/7 the RF carrier frequency. The LO is 3x the VCO frequency. The LO and IF are

generated from a built-in synthesizer that has a step size at the RF carrier frequency of either 500 MHz or 540 MHz depending

upon which reference clock frequency is used. The 540 MHz step size uses a 308.571 MHz reference, and the 500 MHz step

uses a 285.714 MHz frequency. The IEEE channels for 802.11ad and 802.11aj are supported when the 540 MHz step size is

used. An RF signal in the range of 57 to 64.8 GHz is coupled to the LNA via the low-loss WR15 waveguide port. The LO is

mixed with the RF signal after the LNA and down converted the IF signal in the 8 to 9 GHz range. A notch filter attenuates the

image frequency. The IF signal is filtered with a variable gain amplifier and filter with approximately 20 dB range, which is then

fed into the quadrature mixers which down converts directly to baseband. There are also selectable AM and FM detectors for

non-coherent modulation schemes. Additional variable gain and filtering are available in the baseband amplifier section which

follows the I/Q mixers and detectors. The overall phase noise and I/Q balance specifications are sufficient for up to 16 QAM

operation. Configuration and settings are controlled through a digital serial interface port. The block diagram below shows

the various stages and circuits in the module.

Var IF

Filter

IF VGA

Synthesizer

57.0 to 64.8 GHz 0.5 or 0.54 GHz step

Serial Control Registers

+1.5

+2.7

0º

90º

FM

DET

AM

DET

Div

x3

2

BB VGA

Var BB

Filter

BB VGA

Var BB

Filter

WR-15 Waveguide

UG-385/U Flange

REFCLKP

REFCLKM

OUT_QM

OUT_QP

OUT_IM

OUT_IP

LNA

Figure 3 PEM002 Block Diagram