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 * One unit costed 370,000 JPY. A rough estimation of the cost can be found in the attached [[attachment:VCO_parts_prices.xlsx| spread sheet]].
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  ||<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 ||		   || ''' Frequency [Hz] ''' ||<style="background-color: red;"> ''' Measured noise in [Hz/Hz^1/2^ ] ''' <<BR>> '''that converted in [dBc/Hz]''' ||<style="background-color: lightblue;"> ''' Spec. values without dividers in [Hz/Hz^1/2^] ''' <<BR>> '''and in [dBc/Hz]''' ||
  || 0.01 || 5 (51 dBc/Hz)|| -- ||
  || 0.1 || 0.4 (9 dBc/Hz)|| -- ||
  || 1 || 0.1 (-23 dBc/Hz)|| -- ||
  || 10 || 0.05 (-49 dBc/Hz)|| -- ||
  || 100 || 0.05 (-69 dBc/Hz)|| -- ||
  || 1,000 || 0.05 (-89 dBc/Hz)|| 0.02 (-98 dBc/Hz) ||
  || 10,000 || 0.03 (-113 dBc/Hz)|| 0.01 (-123 dBc/Hz) ||
  || 100,000 || -- || 0.01 (-143 dBc/Hz) ||
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  i. Determination of whether ROS-102-191 meets the specification in phase noise.   i. Determination of whether ROS-102-919 meets the data sheet values in phase noise.
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== Improvements over the previous version ==
 . Several points will be improved as listed below.
  * Mechanically stable mounting by providing an aluminum plate as was done for the RF distribution amplifiers and similar ().
  * Any others?
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 ||<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 '''||<style="background-color: red;"> ''' Total Price''' ||<style="background-color: red;"> ''' Procurement Status '''||
 || Seed VCO || ROS-102-191 (with eval.board TB-10)|| Minicicruits || center freq. 100 MHz|| || || || Asking Minicricuit Yokohama (2019/Jul/18; KI) ||
 || RF amp for VCO output || LNBA-0-13-BJ-100-15 || Wenzel || || || || || Quote being made (2019/Jul/18; KI)||
 || RF amp for LO || LNBA-10-23-AE-100-15 || Wenzel || +23 dBm output ||  || || || Quote being made (2019/Jul/18; KI)||
 || RF amp for the output signal|| LNBDA-2-26-AC-AE-100-15 || Wenzel ||+26 dBm output|| || || || Quote being made (2019/Jul/18; KI) ||
 || Frequency divider || LNFD2-10-100-13-1-13-15 || Wenzel || factor of 10 || || || || Quote being made (2019/Jul/18; KI) ||
 || Low noise Mixer || LNMX-X-X-X || Wenzel || no attenuation || || || || Quote being made (2019/Jul/18; KI) ||
 || 1U Chassis for RF || JGW-D1706470-v1 || AEL || || || || || Quote being made (2019/Jul/18; KI) ||
 || 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 || || || || || || || Quote being made ||
 || Ceramic capacitors for noise reduction || RCE5C1H103J1K1H03B || Murata|| 10 nF || 5|| || || ||
 || SMA barrel connectors || || || || || || || ||
 || SMA right angle connectors || || || || ||		  ||<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 '''||<style="background-color: red;"> ''' Total Price''' ||<style="background-color: red;"> ''' Procurement/Preparation Status '''||
 || Seed VCO || ROS-102-919 (with eval.board TB-10)|| Minicicruits || center freq. 100 MHz||19,400 JPY || 3 || || arrived (2019/Aug; KI) ||
 || RF amp for VCO output || LNBA-0-13-BJ-100-15 || Wenzel ||   || $411 || 2|| || Order placed (2019/Aug/23rd; KI) and arrived (2019/Nov/8)||
 || RF amp for LO || LNBA-10-23-AE-100-15 || Wenzel || +23 dBm output ||$448 || 2|| || s/a ||
 || RF amp for the output signal|| LNBDA-2-26-AC-AE-100-15 || Wenzel ||+26 dBm output|| $754||2 || || s/a ||
 || Frequency divider || LNFD2-10-100-13-1-13-15 || Wenzel || factor of 10 || $486|| 2 || || s/a ||
 || Low noise Mixer || LNMX-X-X-X || Wenzel || no attenuation || $396|| 2 || || s/a ||
 || 1U Chassis for RF || JGW-D1706470-v1 || AEL || || ||2 || || AEL has several (2019/Jul/18) ||
 || Narrow band pass filter || MC80-10-4AA || Lark Engineering || 80 MHz || || 2 || || - ||
 || Aluminum plates for heat sink || || || needs to be designed || || 2 || || - ||
 || Low noise power unit for RF || || || || || 2 || || - ||
 || Ceramic capacitors for noise reduction || RCE5C1H103J1K1H03B || Murata|| 10 nF ||  || 5|| || ||
 || SMA barrel connectors || || || || || many || || ||
 || SMA right angle connectors || || || || || many || || ||

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), aiming at quick implementation, inspired by LIGO low noise VCOs. JGW-D1808968

  • One unit costed 370,000 JPY. A rough estimation of the cost can be found in the attached spread sheet.

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 noise in [Hz/Hz1/2 ]
      that converted in [dBc/Hz]

      Spec. values without dividers in [Hz/Hz1/2]
      and in [dBc/Hz]

      0.01

      5 (51 dBc/Hz)

      --

      0.1

      0.4 (9 dBc/Hz)

      --

      1

      0.1 (-23 dBc/Hz)

      --

      10

      0.05 (-49 dBc/Hz)

      --

      100

      0.05 (-69 dBc/Hz)

      --

      1,000

      0.05 (-89 dBc/Hz)

      0.02 (-98 dBc/Hz)

      10,000

      0.03 (-113 dBc/Hz)

      0.01 (-123 dBc/Hz)

      100,000

      --

      0.01 (-143 dBc/Hz)

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.
  • The below is a list of the things that need to be evaluated before building it.
    1. Determination of whether ROS-102-919 meets the data sheet values in phase noise.
    2. Identification of where the dominant noise sources are.
    3. Identification of where the frequency hop comes from.
    4. Estimate the impact of thermal fluctuation through the push in VCO.

Improvements over the previous version

  • Several points will be improved as listed below.
    • Mechanically stable mounting by providing an aluminum plate as was done for the RF distribution amplifiers and similar ().
    • Any others?

Bill of Materials

  • Description

    Part number

    Manufacture

    Notes

    Price/each

    Quantities

    Total Price

    Procurement/Preparation Status

    Seed VCO

    ROS-102-919 (with eval.board TB-10)

    Minicicruits

    center freq. 100 MHz

    19,400 JPY

    3

    arrived (2019/Aug; KI)

    RF amp for VCO output

    LNBA-0-13-BJ-100-15

    Wenzel

    $411

    2

    Order placed (2019/Aug/23rd; KI) and arrived (2019/Nov/8)

    RF amp for LO

    LNBA-10-23-AE-100-15

    Wenzel

    +23 dBm output

    $448

    2

    s/a

    RF amp for the output signal

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

    Wenzel

    +26 dBm output

    $754

    2

    s/a

    Frequency divider

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

    Wenzel

    factor of 10

    $486

    2

    s/a

    Low noise Mixer

    LNMX-X-X-X

    Wenzel

    no attenuation

    $396

    2

    s/a

    1U Chassis for RF

    JGW-D1706470-v1

    AEL

    2

    AEL has several (2019/Jul/18)

    Narrow band pass filter

    MC80-10-4AA

    Lark Engineering

    80 MHz

    2

    -

    Aluminum plates for heat sink

    needs to be designed

    2

    -

    Low noise power unit for RF

    2

    -

    Ceramic capacitors for noise reduction

    RCE5C1H103J1K1H03B

    Murata

    10 nF

    5

    SMA barrel connectors

    many

    SMA right angle connectors

    many

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