TECHNICAL DATA SHEET

PEM010

60 GHz Transmitter (Tx) Waveguide Module

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8

Synthesizer Design

The PEM010 transmitter 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 tables below show the RF carrier, IF, VCO and LO for the frequency range from 57 GHz to 64.80 GHz at 540 MHz and

500 MHz channel spacing respectively. The reference clock for the synthesizer at 540 MHz spacing is 308.571 MHz; for 500

MHz spacing it is 285.714 MHz. The loop bandwidth of the synthesizer phase lock loop is 200 kHz.

540 MHz Spacing

500 MHz Spacing

IF

VCO

LO

57.24

8.177

16.354

49.063

57.78

8.254

16.509

49.526

58.32

8.331

16.663

49.989

58.86

8.409

16.817

50.451

59.40

8.486

16.971

50.914

59.94

8.563

17.126

51.377

60.48

8.640

17.280

51.840

61.02

8.717

17.434

52.303

61.56

8.794

17.589

52.766

62.10

8.871

17.743

53.229

62.64

8.949

17.897

53.691

63.18

9.026

18.051

54.154

63.72

9.103

18.206

54.617

64.26

9.180

18.360

55.080

64.80

9.257

18.514

55.543

IF

VCO

LO

57.00

8.143

16.286

48.857

57.50

8.214

16.429

49.286

58.00

8.286

16.571

49.714

58.50

8.357

16.714

50.143

59.00

8.429

16.857

50.571

59.50

8.500

17.000

51.000

60.00

8.571

17.413

51.429

60.50

8.643

17.286

51.587

61.00

8.714

17.429

52.286

61.50

8.786

17.571

52.714

62.00

8.857

17.714

53.143

62.50

8.929

18.587

53.571

63.00

9.000

18.000

54.000

63.50

9.071

18.143

54.429

64.00

9.143

18.286

54.857

Figure 4 Synthesizer RF, IF, VCO and LO Frequencies