4 th -Generation Stealth All-Band Electrically Reversible Directional Array. Jeff Blaine ACØC Presented to the KC DX Club 26 July 2010
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1 4 th -Generation Stealth All-Band Electrically Reversible Directional Array Jeff Blaine ACØC Presented to the KC DX Club 26 July 2010
2 Array Overview
3 Array Views
4 Array Features All band coverage 160m 6m Rig driven automatic antenna selection Electrically reversible direction Computer controlled rotor interface Microprocessor driven shack control head Mono-band, 2-3 element construction on 40-6m No outside elements High power contest RTTY duty-cycle capable 2010 Jeff Blaine ACØC- all rights reserved
5 Reliability and Maintainability Factors Relay switching (direction, antenna, band select) can be attic controlled Mono-band construction simplifies tuning PL259 mounted at each element center for easy connection of VNA or MFJ-259 All elements and coils adjustable from attic floor except 12m Ends secured via bungee cord to maintain tension 40m bent elements pulley mounted with bungee tie Attic-mounted dummy load 2010 Jeff Blaine ACØC- all rights reserved
6 Project Consumption 385 MMANA-GAL simulation models built over about 4 months time 19 antenna elements 6 traps 12m DE, 15/17/10 DE, 80m dipole 37 computer controlled relays Atmel AVR micro-controller with 1990-class IBM PC performance 600 control cable RG ga THHN stranded wire strung Enough type-31 ferrites purchased to cause a lift in FairRite s stock value Hardware + physical antenna construction spread over 6 weeks?? trips up and down the ladder to the attic 0 number of times fell through ceiling so far 2010 Jeff Blaine ACØC- all rights reserved
7 Complexity Driven by Element Detuning 2010 Jeff Blaine ACØC- all rights reserved
8 Element Open/Short + Coax Feed-line Disconnect Module
9 End Element Isolation Modules
10 Element Detuning Matrix BAND SEG E/W CENTER F ALL ITEMS SHORTED - ITEMS BELOW **OPEN** DIP 40e 40w 30e 30w 20e 20c 12e DIP 40E 40W 30e 30w 20e 20c 12e 40 1/ E 40w 30w 30e 20e 20c 30 9(11) DIP 40E 30E 30W C DIP 17m 12m 40w m DIP 12m 40E 40w 12E DIP 40e 40w - 15m, WEST - assumes 15m split in middle of DE (open) 10E m 30E 30W 20E 12m - 15m, WEST 2010 Jeff Blaine ACØC- all rights reserved
11 SHACK ATTIC Ant Sel Control System Topology Ant Select x8 Ameritron Remote Ant Switch Ant Relay Board Element Open/Short Coax Feed Disconnect Direction Select 15/17m Mode Select CAT BandData Rotor Rig Ameritron Auto Ant Switch Control Head PC Auto Tuner Force Carrier Tx Active Do Tune Tuning Active 2010 Jeff Blaine ACØC- all rights reserved
12 Hardware Implementation
13 Shack Control Head Function
14 Serial Shack Control Head Micro Controller 2010 Jeff Blaine ACØC- all rights reserved
15 Shack Control Head
16 Shack Control Head Green Dashed Box - L/C Bypass of Lines to Attic Relay Control Board 2010 Jeff Blaine ACØC- all rights reserved
17 Relay Control Board
18 Relay Control Board
19 Relay Control Board
20 Relay Control Board
21 Relay Control Board Antenna Select Decoding From Ameritron Switch to Relay Control Board 2010 Jeff Blaine ACØC- all rights reserved
22 Relay Control Board 2010 Jeff Blaine ACØC- all rights reserved Open-Short, Direction and 15/17 Mode Schematic
23 Simulation Results and Construction Details 2010 Jeff Blaine ACØC- all rights reserved
24 10m Simulation
25 Attic View Facing East
26 12m Simulation
27 15m Simulation
28 17m Simulation
29 20m Simulation
30 20m End Element Detail
31 30m Simulation
32 40m Simulation
33 40m Direction Switching Head
34
35
36 80m Simulation Comparison with free-standing, complete V shape at same height 6db delta 2010 Jeff Blaine ACØC- all rights reserved
37 160/80m Dipole + 12m DE Detail
38 160m Simulation Comparison to free standing 160m loaded dipole at same height 2010 Jeff Blaine ACØC- all rights reserved
39 Improved RG rd Gen Trap Evolution New 80m Trap / 160m Loading Original RG-59 2 New 80m Trap + 160m Loading Coil Construction Details ¼ copper tubing 6 diameter form ¼ lexan seperators 15 Kv 100 pf fixed vac cap 2010 Jeff Blaine ACØC- all rights reserved
40 Remaining Work
41 Checklist DX (high RDF best) & Contesting (low RDF best) Putting F/B vs. Gain Sensitivity into Context? Measure antenna element phasing & interactions between antenna sets o W8WWV 2008 Dayton Antenna Forum Method A New Approach for Measuring Complex Antenna Currents in Vertical Arrays Measure actual field pattern o W8WWV 2010 Dayton Antenna Forum Method Exotic Antenna Pattern Measurement Backlight for LCD & new enclosure 2010 Jeff Blaine ACØC- all rights reserved
42 F/B vs. Gain Sensitivity 20m Example 2010 Jeff Blaine ACØC- all rights reserved
43 F/B vs. Gain Sensitivity 30m Example 2010 Jeff Blaine ACØC- all rights reserved
44 Checklist Putting F/B vs. Gain Sensitivity into Context Measure antenna element phasing & interactions between antenna sets o W8WWV 2008 Dayton Antenna Forum Method A New Approach for Measuring Complex Antenna Currents in Vertical Arrays Measure actual field pattern o W8WWV 2010 Dayton Antenna Forum Method Exotic Antenna Pattern Measurement Backlight for LCD & new enclosure 2010 Jeff Blaine ACØC- all rights reserved
45 W8WWV Reverse Simulation Overview Measure Element RF Currents with VNA + Mux - Magnitude/Phase Load Data into Simulation Model Simulation Generates Plot of Actual Antenna Performance 2010 Jeff Blaine ACØC- all rights reserved
46 RF Current Sensors
47 Multiplex Board for N2PK VNA Design Concept W8WWV Circuit, PCB and Build KØRU 2010 Jeff Blaine ACØC- all rights reserved
48 Checklist Putting F/B vs. Gain Sensitivity into Context Measure antenna element phasing & interactions between antenna sets o W8WWV 2008 Dayton Antenna Forum Method A New Approach for Measuring Complex Antenna Currents in Vertical Arrays Measure actual field pattern o W8WWV 2010 Dayton Antenna Forum Method Exotic Antenna Pattern Measurement Backlight for LCD & new enclosure 2010 Jeff Blaine ACØC- all rights reserved
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