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== Descriptions ==
Low phase noise, a center frequency of 70 MHz, actuation range of several 100 kHz, aaa dBm output		 = Descriptions =
Low phase noise, a center frequency of 80 MHz, actuation range of several 100 kHz, aaa dBm output
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== Endeavour model ==
 . Designed by Y. Enomoto (2018), inspired by LIGO low noise VCOs.		 <<BR>>
= Prototype model =
----
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 . [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8968| Prototype VCO JGW-D1808968]]  * Designed by Y. Enomoto (2018), inspired by LIGO low noise VCOs. [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=8968| JGW-D1808968]]
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== Production model ==
 . Sophisticated version of the endeavour model.		 === Noise performance ===
 * Worse than the specification for the non-divided phase noise ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7425|klog 7425]]) at 1 and 10 kHz. See the table below.
 * Most of the RF components are not secured to the chassis in order to allow for the quick implementation. This may cause undesired acoustic coupling.
 . {{attachment:7425_20181218132925_lnvcopn2.png|Measured freq. noise (klog 7425) | width=400}}

  ||<style="background-color: red;"> ''' Frequency [Hz] ''' ||<style="background-color: red;"> ''' Measured Frequency noise [Hz/Hz^1/2] ''' ||<style="background-color: red;"> ''' Equivalent Phase noise [dBc/Hz] ''' ||<style="background-color: red;"> '''ROS-102-919 specification w/o frequency division [dBc/Hz]'''||
  || 0.01 || 5 || 51 || --||
  || 0.1 || 0.4 || 9 || -- ||
  || 1 || 0.1 || -23 || -- ||
  || 10 || 0.05 || -49 || -- ||
  || 100 || 0.05 || -69 || -- ||
  || 1,000 || 0.05 || -89 || -98 ||
  || 10,000 || 0.03 || -113 || -123 ||
  || 100,000 || -- || -- || -143 ||

=== Tuning Range ===
 * Linear range of 0.8 to 2.8 V achieved ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=6544| klog 6544]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=6638|klog 6638]]). This is smaller than the expected range of 0-5 V.
 * Resulting frequency showed some kind of hops, limiting the linear range. No clear explanation exists at the moment.
 * Tuning sensitivity of 0.42 MHz/V is achieved ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=6544|klog 6544]]). This is consistent with the specification of ROS-102-919 whose sensitivity is 4.5 MHz/V typ.
 . {{attachment:6544_20181013071657_1.png| | width=300}} {{attachment:6544_20181013071708_2.png | | width=300}}

<<BR>>
= Endeavour model =
----
 * Sophisticated version of the prototype model.
 * Things need to be evaluated before building it.
  i. Determination of whether ROS-102-191 meets the specification in phase noise.
  i. Identification of where the dominant noise sources are.
  i. Identification of where the frequency hop comes from.

== Bill of Materials ==
 
 ||<style="background-color: red;"> '''Description''' ||<style="background-color: red;"> '''Part number '''||<style="background-color: red;"> ''' Manufacture''' ||<style="background-color: red;"> ''' Notes '''||<style="background-color: red;"> ''' Price/each '''||<style="background-color: red;"> ''' Quantities '''||
 || Seed VCO || ROS-102-191 (with eval.board TB-10)|| Minicicruits || center freq. 100 MHz|| ||
 || RF amp for VCO output || LNBA-0-13-BJ-100-15 || Wenzel || || ||
 || RF amp for LO || LNBA-10-23-AE-100-15 || Wenzel || +23 dBm output || ||
 || RF amp for the output signal|| LNBDA-2-26-AC-AE-100-15 || Wenzel ||+26 dBm output|| ||
 || Frequency divider || LNFD2-10-100-13-1-13-15 || Wenzel || factor of 10 || ||
 || Low noise Mixer || LNMX-X-X-X || Wenzel || no attenuation || ||
 || 1U Chassis for RF || JGW-D1706470-v1 || AEL || || ||
 || Narrow band pass filter || MC80-10-4AA || Lark Engineering || 80 MHz || || 1 ||
 || Aluminum plates for heat sink || || || needs to be designed || ||
 || Low noise power unit for RF || || || || ||
 || Ceramic capacitors for noise reduction || RCE5C1H103J1K1H03B || Murata|| 10 nF || 5||
 || SMA barrel connectors || || || || ||
 || SMA right angle connectors || || || || ||
 

Low Noise VCOs

Descriptions

Low phase noise, a center frequency of 80 MHz, actuation range of several 100 kHz, aaa dBm output


Prototype model

  • Designed by Y. Enomoto (2018), inspired by LIGO low noise VCOs. JGW-D1808968

Noise performance

  • Worse than the specification for the non-divided phase noise (klog 7425) at 1 and 10 kHz. See the table below.

  • Most of the RF components are not secured to the chassis in order to allow for the quick implementation. This may cause undesired acoustic coupling.

  • Measured freq. noise (klog 7425)

    • Frequency [Hz]

      Measured Frequency noise [Hz/Hz^1/2]

      Equivalent Phase noise [dBc/Hz]

      ROS-102-919 specification w/o frequency division [dBc/Hz]

      0.01

      5

      51

      --

      0.1

      0.4

      9

      --

      1

      0.1

      -23

      --

      10

      0.05

      -49

      --

      100

      0.05

      -69

      --

      1,000

      0.05

      -89

      -98

      10,000

      0.03

      -113

      -123

      100,000

      --

      --

      -143

Tuning Range

  • Linear range of 0.8 to 2.8 V achieved (klog 6544, klog 6638). This is smaller than the expected range of 0-5 V.

  • Resulting frequency showed some kind of hops, limiting the linear range. No clear explanation exists at the moment.

  • Tuning sensitivity of 0.42 MHz/V is achieved (klog 6544). This is consistent with the specification of ROS-102-919 whose sensitivity is 4.5 MHz/V typ.

  • 6544_20181013071657_1.png 6544_20181013071708_2.png


Endeavour model

  • Sophisticated version of the prototype model.
  • Things need to be evaluated before building it.
    1. Determination of whether ROS-102-191 meets the specification in phase noise.
    2. Identification of where the dominant noise sources are.
    3. Identification of where the frequency hop comes from.

Bill of Materials

  • Description

    Part number

    Manufacture

    Notes

    Price/each

    Quantities

    Seed VCO

    ROS-102-191 (with eval.board TB-10)

    Minicicruits

    center freq. 100 MHz

    RF amp for VCO output

    LNBA-0-13-BJ-100-15

    Wenzel

    RF amp for LO

    LNBA-10-23-AE-100-15

    Wenzel

    +23 dBm output

    RF amp for the output signal

    LNBDA-2-26-AC-AE-100-15

    Wenzel

    +26 dBm output

    Frequency divider

    LNFD2-10-100-13-1-13-15

    Wenzel

    factor of 10

    Low noise Mixer

    LNMX-X-X-X

    Wenzel

    no attenuation

    1U Chassis for RF

    JGW-D1706470-v1

    AEL

    Narrow band pass filter

    MC80-10-4AA

    Lark Engineering

    80 MHz

    1

    Aluminum plates for heat sink

    needs to be designed

    Low noise power unit for RF

    Ceramic capacitors for noise reduction

    RCE5C1H103J1K1H03B

    Murata

    10 nF

    5

    SMA barrel connectors

    SMA right angle connectors

KAGRA/Subgroups/MIF/AEL/LowNoiseVCOs (last edited 2019-11-12 11:32:54 by KiwamuIzumi)