トランジスタ芸術

トランジスタ技芸術

Transistor Geijutsu

by Yoshiyuki Takeyasu / JA6XKQ　

What's New
last updated 13 April 2025 15:50 JST

Photo Gallery
New photo
last updated 30 December 2024 12:45 JST

#1 Geodesic Parabola Antenna (Rev.4)　　
last updated 11 October 2003 18:28 JST : Rev.4

#1-2 Geodesic Parabola Antenna　-　80cmφ (Rev.1)
last updated 4 January 2004 16:54 JST : Rev.1

#1-3 80cmφ Geodesic Parabola Antenna　-　Construction (Rev.2)
last updated 9 May 2004 21:40 JST : Rev.2 - adding an example

#1-4 Q&A on Geodesic Parabolic Antenna in Ham Fair 2004 (Rev.1)
last updated 24 August 2004 01:39 JST : Rev.1

#1-5 Geodesic Parabolic Antenna (Rev.1) - reprint from MICROWAVE CHALLENGE 2004
last updated 23 November 2004 21:00 JST : Rev.1

#1-6 Geodesic Parabolic Antenna (Rev.4) - presentation at ALL JAPAN MICROWAVE MEETING 2004
last updated 6 December 2004 22:19 JST : Rev.4 - adding notes

#1-7-1 Geodesic Parabolic Antenna (Rev.1) - author's manuscript of DUBUS 2/2005
last updated 4 November 2006 10:30 JST : Rev.1

#1-7-2 Design Chart for Geodesic Parabolic Antenna (Ver.2)
last updated 13 May 2024 9:40 JST : Rev.1

#1-8 Camellia - The GeoPara-II (Rev.2)
Design tool by Excel spreadsheet (Rev.2)
last updated 27 July 2020 20:27 JST : Rev.2

#1-9 Calculation behind the design of Geodesic Parabolic Reflector Antenna (Rev.2)
last updated 29 December 2024 16:00 JST : Rev.2

#2 Directional Coupler (Rev.3)
last updated 25 August 2004 23:00 JST : Rev.3 - correcting typos

#2-2 Multi-section Directional Coupler (Rev.2)
last updated 15 February 2004 19:41 JST : Rev.2 - adding description of internal structure

#2-3 Multi-section Directional Coupler - Design (Rev.1)
last updated 1 Jun 2004 00:13 JST : Rev.1

#3 Poor man's Noise Source (Rev.2)
last updated 16 October 2003 23:50 JST : Rev.2 - adding a circuit diagram

#4 Poor man's PLL Sweeper (Rev.3)
last updated 18 November 2003 23:39 JST : Rev.3 - adding descriptions

#4-2 Poor man's PLL Sweeper - Performance (Rev.2)
last updated 14 June 2004 21:01 JST :　Rev.2 - adding measured data, correcting typos

#4-3 Poor man's PLL Sweeper - Performance (#2) (Rev.2)
last updated 5 July 2004 23:41 JST : Rev.2 - adding consideration

#4-4 Poor man's PLL Sweeper - Performance (#3) (Rev.1)
last updated 11 July 2004 9:13 JST : Rev.1

#4-5 Poor man's PLL Sweeper - Performance (#4) (Rev.2)
last updated 25 July 2004 10:13 JST : Rev.2 - correcting typos

#5 Ring light - for better photograph (Rev.1)
last updated 11 January 2004 21:15 JST : Rev.1

#6 Bibliography on Patch Antenna
coming soon

#7 S-band Patch Feed for Geodesic Parabolic Antenna (Rev.3)
last updated 14 August 2004 23:58 JST : Rev.3 - correcting typos

#7-2 S-band Patch Feed for Geodesic Parabolic Antenna (#2) (Rev.3)
last updated 11 October 2004 21:50 JST : Rev.3 - adding notes

#7-3 Consideration of Measurement of S-band Patch Feed (Rev.1)
last updated 23 October 2004 22:01 JST : Rev.1

#7-4 S-band Patch Feed for Geodesic Parabolic Antenna (#3) (Rev.1)
last updated 4 November 2004 00:01 JST : Rev.1

#8 Simple Antenna Positioner (Rev.1)
last updated 31 August 2004 22:11 JST : Rev.1

#8-2 Yet Another Simple Antenna Positioner (Rev.1)
last updated 5 September 2004 22:46 JST : Rev.1

#8-3 A/D Converter for Simple Antenna Positioner (Rev.1)
last updated 16 September 2004 21:59 JST : Rev.1

#9 Practical Measurement of Phase Center (Rev.2)
last updated 4 December 2004 09:59 JST : Rev.2 - correcting typos

#10 Defocusing (Rev.3)
last updated 11 December 2004 20:23 JST : Rev.3 - correcting notes

#10-2 Focusing (Rev.1)
last updated 11 December 2004 20:16 JST : Rev.1

#10-3 Memorandum - Antenna Engineering Using Physical Optics (Rev.1)
last updated 15 January 2005 15:48 JST : Rev.1

#10-4 Performance degradation due to misalignment of feed (Rev.1)
last updated 9 August 2014 22:59 JST : Rev.1

#10-5 Feed Radiation Pattern from Subreflector (Rev.2)
last updated 12 September 2015 11:42 JST : Rev.2

#10-6 Simulation of Cassegrain Antenna using NEC2++ (Rev.1)
last updated 12 September 2015 11:30 JST : Rev.1

#10-7 Phase Center of Horn Antenna (Rev.1)
last updated 23 September 2015 14:01 JST : Rev.1

#10-8 Phase Center of the PSO Optimized Horn Antenna (Rev.1)
last updated 25 September 2015 01:06 JST : Rev.1

#11 Five-port Coupler - On the way to Poor Man's VNA (Rev.2)
last updated 18 April 2005 21:50 JST : Rev.2 - adding references

#11-2 Five-port Coupler - On the way to Poor Man's VNA (#2) (Rev.1)
last updated 14 May 2005 12:12 JST : Rev.1

#11-3 Five-port Coupler - On the way to Poor Man's VNA (#3) (Rev.2)
last updated 17 July 2005 00:20 JST : Rev.2 - correcting typos

#11-4 Five-port Coupler - On the way to Poor Man's VNA (#4) (Rev.1)
last updated 18 October 2008 21:22 JST : Rev.1

#11-5 Five-port Coupler - On the way to Poor Man's VNA (#5) (Rev.1)
last updated 7 February 2009 15:57 JST : Rev.1

#12 GPS Disciplined Oscillator (Rev.1)
last updated 4 March 2006 12:15 JST : Rev.1

#12-2-1 GPS Disciplined Oscillator - Antenna (Rev.1)
last updated 4 March 2006 14:49 JST : Rev.1

#12-2-2 GPS Disciplined Oscillator - GPS Antenna Splitter - High Isolation Type (Rev.1)
last updated 4 November 2006 17:24 JST : Rev.1

#12-3 GPS Disciplined Oscillator - Test Jig (Rev.1)
last updated 9 April 2006 00:05 JST : Rev.1

#12-4 GPS Disciplined Oscillator - Measured Data (Rev.1)
last updated 25 June 2006 21:34 JST : Rev.1

#12-5 GPS Disciplined Oscillator - Measured Data #2 (Rev.1)
last updated 28 June 2006 22:53 JST : Rev.1

#12-6 GPS Disciplined Oscillator - Tweaking Turning-point (Rev.2)
last updated 5 August 2006 8:59 JST : Rev.2 - adding references

#12-7 GPS Disciplined Oscillator - Tweaking Turning-point #2 (Rev.1)
last updated 5 August 2006 23:12 JST : Rev.1

#12-8 GPS Disciplined Oscillator - The Three-cornered hat method (Rev.1)
last updated 3 March 2007 17:55 JST : Rev.1

#12-9 Tips for GPS-DO and OCXO - Poster session at ALL JAPAN MICROWAVE MEETING 2007(Rev.1)
last updated 29 November 2007 22:15 JST : Rev.1

#12-10 Automatic Switching of Filters - Brooks Shera's GPS-DO (Rev.1)
last updated 7 April 2022 22:14 JST : Rev.1

#13 Detecting Voyager 1 signal in CT1DMK's wave file(Rev.2)
last updated 26 July 2009 02:20 JST : Rev.2

#13-2 Independent data analysis of Voyager 1 signal in CT1DMK's wave file by James Miller G3RUH (Rev.1)
last updated 8 August 2009 12:48 JST : Rev.1

#13-3 Detecting Voyager 1 signal in CT1DMK's wave file - Consideration on frequency stability (Rev.2)
last updated 15 August 2009 11:03 JST : Rev.2

#14 Experiment of low bit-rate PSK for 5 GHz band Deep Space application - Poster session at ALL JAPAN MICROWAVE MEETING 2009 (Rev.1)
last updated 23 November 2009 10:57 JST : Rev.1

#14-2 Experiment of low bit-rate PSK for 5 GHz band Deep Space application - Pulse shaping filter (Rev.1)
last updated 20 December 2010 00:37 JST : Rev.1

#15 Antenna noise temperature - Evaluation tools
last updated 10 January 2011 11:02 JST : Rev.2

#15-2 Simulation of a horn antenna using NEC2++
last updated 9 October 2011 01:24 JST : Rev.1

#15-2-2 Speeding Up NEC2++ by OpenBLAS
last updated 28 January 2013 00:36 JST : Rev.1

#15-2-3 Speeding Up NEC2++ by Multi-core Processsor
last updated 7 July 2013 12:23 JST : Rev.1

#15-2-4 Expanding Antenna Farm in NEC2 ++
last updated 27 May 2014 21:54 JST : Rev.2

#15-3 Noise temperature of horn antennas
last updated 19 November 2011 09:03 JST : Rev.2 - correcting typos.

#15-4 Optimizing Design of Feed Horn Antenna by Particle Swarm Optimization
last updated 20 December 2014 13:55 JST : Rev.1

#15-5 NEC2 Antenna Modeling by OpenSCAD (Rev.2)
last updated 10 January 2016 07:16 JST : Rev.2 - correcting typo

#15-6 Simulation of Offset Reflector Antennas using NEC2++ (Rev.1)
last updated 11 January 2016 17:35 JST : Rev.1

#15-7 Simulation of Offset Reflector Antennas using NEC2++ - A Consideration on Size of Surface-patch (Rev.1)
last updated 9 October 2016 11:01 JST : Rev.1

#15-8 Blockage Loss by Feed Horn Array (Rev.4)
last updated 13 October 2018 1:45 JST : Rev.4

#15-8-2 Corrections to "Blockage Loss by Feed Horn Array"
last updated 30 July 2021 13:44 JST : Rev.1

#15-9 Simulation of Chaparral Horn Antenna using NEC2++ (Rev.3)
last updated 23 September 2018 11:13 JST : Rev.3

#15-10 Simulation of RCS using NEC2++ (Rev.1)
last updated 6 October 2018 21:49 JST : Rev.1

#15-11 Simulation of Aperture Efficiency(Rev.1)
last updated 13 October 2018 1:28 JST : Rev.1

#16 Changes of S-parameters and Noise Parameters due to Feedback
last updated 26 April 2012 23:58 JST : Rev.2

#17 Active Cold Noise Source
last updated 28 April 2012 15:47 JST : Rev.1

#17-2 Active Cold Noise Source - Experimental Data
last updated 7 May 2012 21:55 JST : Rev.2 - correcting typos.

#17-3 Active Cold Noise Source - Experimental Data #2
last updated 21 October 2013 21:02 JST : Rev.2 - correcting typos.

#17-4 Active Cold Noise Source - presentation at 2013 Microwave Meeting
last updated 23 December 2022 22:51 JST : Rev.1

#17-5 Noise Figue Measurement in Microwave Band - presentation at 2022 Microwave Meeting
last updated 23 December 2022 22:51 JST : Rev.1

#18 Converting Manual Waveguide Switch to Motorized
last updated 4 January 2018 23:16 JST : Rev.1

#19 Simulation of Dielectric-Rod Loaded Horn Antenna using openEMS
last updated 15 September 2019 23:04 JST : Rev.2

#19-2 Simulation of Multi Mode Horn using openEMS
last updated 16 September 2019 20:20 JST : Rev.1

#20 Modeling and Correction of Antenna Pointing Errors
Excel spreadsheet
last updated 3 July 2021 20:34 JST : Rev.1

#21 Radio and Satellite of Amateur - Presentation at UNISEC Frequency Working Group, 2003 October 18
The title is "Radio and Satellite of Amateur", but it is not "Amateur-Radio Satellite" nor "Amateur Satellite".
last updated 16 October 2003 02:46 JST : Rev.2

#22 DSN X-band (8.4 GHz) BPF
last updated 15 October 2023 13:11 JST : Rev.1

#23 X-band (8.4 GHz) Down Converter
last updated 12 October 2024 19:29 JST : Rev.1

#24 Simple Circular to Rectangular Waveguide Transition
last updated 13 April 2025 15:50 JST : Rev.1