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Measurements
BWO Fast Sweep Oscillators of G4-143x series

   Features
  • 37-170GHz in seven bands
  • <0.2 ms full waveguide sweep time
  • Smooth power/frequency dependence
  • Fully packaged
  • Programmable from front panel or GPIB bus
  • Frequency accuracy 0.01%
  • High output power
   

Applications

  • L.O. for sweeping receivers
  • Laboratory measurement and test equipment
  • Plasma diagnostics: ECE and ECA radiometers,
    broadband sweeping interferometers and reflectometers
  • Source for Network Analyzers
  • Spectrometry
  • Bias tunable for AFC and phase-locked operation (optionally) **

Description

ELVA-1's announces new G4-143x series of BWO generators. This series is a result of further developments of G4-141x/G4-142x (GPIB) generators family. PC compatible microcomputer integrated into the device provides total control of the system. The sweeper self-tests at turn-on. Two independent DAC-s control frequency and output power. Minimal full band sweep time is 10 ms. Optionally 0.2 ms sweep time is available. User from front panel or GPIB (optional RS-232) bus controls power, initial and final frequency, time of sweep, internal amplitude modulation. Various programs of power and frequency change are provided including 10 user-defined programs. There are two inputs for external frequency and power control. The rugged High Voltage power supply is specially designed to withstand the rapid voltage changes inherent in BWO deceleration. Each generator is individually calibrated for output power versus frequency, with different power levels and frequency versus control voltage relationships. The resulting data supplied with the unit for 15 various generators of G4-143g model (110-170 GHz) are illustrated in the plot below:


ELVA's BWO sweepers - BWO power levels and frequency versus control voltage diagram

These generators are completely self-contained, including all control and power supply systems required to drive the BWO tube. The BWO tube is fully protected against application of improper operating voltages.

Generators are available in all standard waveguide frequency regions from 37GHz to 170 GHz. Models with not standard frequency ranges are discussible. These generators have high power output, for instance, G4-143e model for W-band has typical peak power up to 90 mW.

Specifications
 

MODEL NUMBER

G4-143a

G4-143b

G4-143c

G4-143d

G4-143e

G4-143f

G4-143g

Frequency Range, GHz

37-54

40-60

50-75

60-90

75-110

90-140

110-170

Output waveguide size, mm

5.69x2.84

WR22

4.8x2.4

WR19

3.8x1.9 WR15

3.1x1.5 WR12

2.54x1.27 WR10

2.03x1.02 WR8

1.7x0.83 WR6

Wavequide Flange

UG-383/U

UG-383/U-M

UG-385/U

UG-387/U

UG-387/U-M

UG-387/U-M

UG-387/U-M

Minimum CW power, mW 

50

100

25

25

25

35

25

Typical peak power, mW

150

200

80

80

90

110

80

Common Specification

ELVA's Back-ward Wave Oscillators (BWO) - see general specs here

* These features are not included in basic models. Available optionally upon request.
** The Option “Bias tunable for AFC and phase-locked operation” is available upon request only.
***
Output power regulation range 0-20dB is uncontrolled (not specified) parameter.

The G4-143x oscillator can be shipped as phase lockable device (optional). The Phase Looked Loop for G4-143x oscillator allows up to 1Hz accuracy of oscillator output on any of Ka, Q, U, V, E, W, F, and D subbands covering frequency range from 26.5 GHz to 170 GHz. In fact, the accuracy of PLL-featured G4-143x millimeter wave oscillator corresponds the accuracy of external synthesizer. For example, if the synthesizer has 0.1 GHz accuracy, the same one will applicable for PLL-featured G4-143x oscillator. Please mind, the external synthesizer is not included to our shipment. Researchers are advised to use one of market-available branded microwave synthesizers as the reference unit. The PLL-featured G4-143x oscillator will keep the accuracy of the external reference synthesizer, while delivers powerful output signal on upper frequency.

The advantage of PLL-featured oscillators of G4-143x series on third-party microwave ocsillators with passive multipliers is in relatively high power output. If taking, for example, for consideration the G4-143g oscillator for upper frequency 110-170 GHz subband, with more than 10 mW output power it delivers outstanding quality to millimeter instrumentation research projects. Ones of the most promised applications for PLL-featured oscillators of G4-143x series are antenna research projects.

Note. For an additional charge, customers may select the BWO tube for their generator from data on tubes in inventory. Power levels up to twice the stated specification are often available. A GPIB card and software for PC microcomputer operation are available at extra cost including driver for LabView program.

Delivery can be implemented within 4-6 weeks ARO.

How to Order:

Specify Model Number G4-143x-A, where

X - frequency range

A - AC input voltage.

Example:  To order BWO sweeper with the following specification: operation frequency 110-170 GHz, input AC voltage 110ACV, it should be ordered as G4-143g-110

All ELVA-1 generators are warranted by the manufacturer for one year after receipt.