mm-wave Bridges for EPR Spectrometers

New (2019): 95 GHz ELVA-1 Transceiver for 2D-ELDOR ESR Spectrometer of Cornell University National Biomedical Center for Advanced ESR Technology  

  • Up to 170 GHz operating frequency
  • High sensitivity
  • High frequency stability
  • Low phase noises
  • Amplitude/phase modulation
  • Custom design


    

 
Description
ELVA-1 produces mm-wave bridges and components for EPR spectrometers. Lots of scientific laboratories in the world use ELVA-1’s products in their EPR experiments:
  • Cornell University, USA
  • Free University, Germany
  • Osnabrueck University, Germany
  • Weizmann Institute, Israel

Specifications

 Download User Manual

CW: CW + AM (amplitude modulation)

N Specs Parameters W-band D-band
1 Central frequency 95 GHz 130 GHz
2 Central frequency stability 30 kHz/hour (using DRO) 30 kHz/hour (using DRO)
3 Operating frequency range (any fixed frequencies for DROs and tunable frequencies for VCO) 400 MHz (95 GHz+/-0.2 GHz) 400 MHz (130 GHz+/-0.2 GHz)
4 Frequency stability 10-6 per °C 10-6 per °C
6 Max mm-wave power Up to 250 mW Up to 50 mW
7 Power stability 0.02 dB per °C 0.02 dB per °C
8 FM noise @ 10 kHz -100 dBc/Hz max -100 dBc/Hz max
9 AM noise @ 10 kHz -140 dBc/Hz max -140 dBc/Hz max
10 Attenuation of output power 60 dB 50 dB
11 Min switching time of amplitude modulation of output signal (10 % to 90 % and 90% to 10 % power level) 5 ns (5*10-9 sec) max, 3-4 ns typical 5 ns (5*10-9 sec)
12 Noise figure of receiver section 12 dB 14 dB
13 Max gain of receiver section 50 dB 50 dB
14 Receiver section bandwidth 200 MHz 200 MHz

 

Pulse: CW + AM + PM 0-90 deg., 0-180 deg. (phase modulation)

N Specs Parameters W-band D-band
1 Central frequency 95 GHz 130 GHz
2 Central frequency stability 30 kHz / hour 40 kHz / hour
3 Operating frequency range 400 MHz (95 GHz+/-0.2 GHz) 400 MHz (130 GHz +/-0.2 GHz)
4 Spectrum width @ -3 dB level <1 kHz 1 kHz
6 Max power Up to 250 mW Up to 50 mW
7 Changing of pulse output power 60 dB 50 dB
8 Changing of output power of CW channel 120 dB 100 dB
 
9 Min duration of output pulses at amplitude modulation of output power 10 ns (10-8 sec) 10 ns (10-8 sec)
10 Min switching time by 2PSK modulation of output signal 5 ns (5*10-9 sec) 5 ns (5*10-9 sec)
11 Accuracy of 180 deg phase shift keeping for 2PSK 1 degree 1 degree
12 Microwave power suppression during a pause between pulses 100 dB 100 dB
13 Switching time up to max suppression level <10 ns 10 ns
14 Noise figure of receiver section 12 dB 14 dB
15 Max gain of receiver section 50 dB 50 dB
16 Receiver section bandwidth 200 MHz 200 MHz
17 Total phase drift 5 degrees/15 min 5 degrees/15 min

MM-wave frequency multiplier and fast (< 5 ns) phase and amplitude modulators below are key
parts of high stable low phase noise mm-wave source for EPR spectrometer.

More info: Poster for 95 GHz MKII ESR SPECTROMETER