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| * 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]] | * Designed by Y. Enomoto (2018), aiming at quick implementation, 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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| || ''' Frequency [Hz] ''' || ''' Measured Frequency noise [Hz/Hz^1/2] ''' || ''' Equivalent Phase noise [dBc/Hz] ''' || '''ROS-102-919 specification w/o frequency division [dBc/Hz]'''|| | ||<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]'''|| |
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| . Sophisticated version of the prototype model. | * Sophisticated version of the prototype model. * The below is a list of the things that 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. i. Estimate the impact of thermal fluctuation through the push in VCO. |
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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/Preparation 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 || || || || || || || - || || 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), aiming at quick implementation, 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.
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.
Endeavour model
- Sophisticated version of the prototype model.
- The below is a list of the things that need to be evaluated before building it.
- Determination of whether ROS-102-191 meets the specification in phase noise.
- Identification of where the dominant noise sources are.
- Identification of where the frequency hop comes from.
- Estimate the impact of thermal fluctuation through the push in VCO.
Bill of Materials
Description
Part number
Manufacture
Notes
Price/each
Quantities
Total Price
Procurement/Preparation 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
-
Ceramic capacitors for noise reduction
RCE5C1H103J1K1H03B
Murata
10 nF
5
SMA barrel connectors
SMA right angle connectors