LOW-PROFILE PLANAR PATCH ANTENNA ARRAYPROFILE …50mhzandup.org/Miroslav Pajovic16x16 Patch Array...
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LOW-PROFILE PLANAR PATCH ANTENNA ARRAYLOW-PROFILE PLANAR PATCH ANTENNA ARRAY For 10 GHz with Gain > +30 dBi
To: “50 MHz & UP” CLUB, North California
From: MIROSLAV PAJOVIC (WA6MP)From: MIROSLAV PAJOVIC (WA6MP)Sr. Antenna Design Engineer
“MP Antennas and Arrays R&D”
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About the author
Received Graduate Diploma Degree in Electrical Engineering from U i it f B l d S bi d th l ti t MSEE i USAUniversity of Belgrade, Serbia; and the evaluation to MSEE in USA, 1994.
Professionally active in Silicon Valley for 20+ years Used to work for Professionally active in Silicon Valley for 20+ years. Used to work for Sanmina and Nortel Networks Corps. as Sr. EMI/RF Engineer; for Cisco Systems as a Technical EMI Leader; and for Enegrous Corp. as Sr. Principal Antenna Engineer.
Currently Antenna Design and EMI Consulting Engineer.
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Some IEEE Publications and USA Patents in R&D
IEEE Conference paper: “Dual-band metamaterial-structured antenna with coplanar waveguide and radial feed stub”, M. Pajovic with team, et al., IEEE Symposium on Antennas and Propagation, Vancouver, Canada, 2015 p g , , ,
Common-Mode Filter for 10-Gb/s Differential Microstrip Lines, M. Pajovic with team, USA patent 8,907,748 B2, 2014.
IEEE Conference paper: “The Gigahertz common-mode filter for differential signal lines”, M. Pajovic with team, et al., IEEE EMC Symposium, Denver, Colorado, 2013, and j , , y p , , , , “Improved Common-Mode Filter for 10-Gb/s Straplines”, M. Pajovic with team, USA Patent
pending. “Gigahertz-range Analysis of Impedance Profiles and Cavity Resonances in Multilayered
planar structures”, M. Pajovic with team, et al., IEEE Transactions on Electromagnetic Compatibility, 2010.
“The Closed-form Equation for Estimating Capacitance of Signal Vias in Arbitrarily Multilayered PCBs”, M. Pajovic with team, IEEE Transactions on Electromagnetic Compatibility, 2008.
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HAM Radio Life
Received the first Ham Radio license in 1967, former Yugoslavia, in a high school (50 years ago!) Later, got a personal call sign YU1WK.
Used to be a long time member of Academic HAM Radio Club YU1EXYfrom Belgrade University (well known European Club on Ham-radio bands and in worldwide contests)
Currently (over a decade) the call sign is WA6MP (extra FCC class)
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LOW-PROFILE PANEL PATCH ANTENNA ARRAYLOW-PROFILE PANEL PATCH ANTENNA ARRAY For 10 GHz with Gain > +30 dBi
Design concept and HFSS simulation results
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16x16 Patch array (256 patches), (16x16) inch
Top view
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Stackup for 16x16 patch Array
Array PCB> 1st layer; 16x16 patches, CuDielectric Ro3035 thick 60 milDielectric Ro3035, thick 60 mil
2nd layer; GND plane, CuFeed PCB> 1st layer; GND plane
Dielectric Ro3035 thick 60 milDielectric Ro3035, thick 60 mil 2nd layer; feed network, Cu
Air; thick 10mmEl t i PCB 1st l GND l CElectronic PCB> 1st layer; GND plane, Cu
Dielectrics (?)Electronic components layer
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PCB panels and the array assembling
Ro3035 or Ro3003 are commercially graded materialso3035 o o3003 a e co e c a y g aded ate a s(DK=3.6 or 3.0; TD=0.0015 or 0.001)
May be used one panel for two PCBs May be used one panel for two PCBs
The Array assembling is putting together the two PCBs (face-to-face d l )ground planes)
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The array element: a wideband patchThe array element: a wideband patch above GND plane with embedded slots
Patch X-Y size:Patch X-Y size: (0.26x0.33) inchGND size: (1x1) inch
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Patch Stackup and dielectric materialp
1st layer: Patch1st layer: Patch
RO3035, thick 60-mil
2nd layer: solid GND
RO3035, thick 60-mil
3rd layer: Microstrip feed
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S11 31 dB @10 3 GHS11=-31 dB @10.3 GHz
500
0.00Ansoft LLC HFSSDesign1XY Plot 2 ANSOFT
-5.00
Curve InfodB(S(2,2))
Setup1 : Sweep1
Name X Ym1 10.3550 -40.2306m2 10.3100 -31.1384
-25.00dB(S
(2,2
))
m2
-45.00
m1
10.00 10.10 10.20 10.30 10.40 10.50 10.60 10.70 10.80Freq [GHz]
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Rad. Pattern with max. Realized Gain=+6.2 dBiRad. Pattern with max. Realized Gain 6.2 dBiin E- and H-plane
10.00Ansoft LLC HFSSDesign1XY Plot 3 ANSOFT
m1Curve Info
0.00
5.00
nTot
al)
-10.00
-5.00
dB(R
ealiz
edG
ai
Name X Ym1 0.0000 6.2155
-9000 -6500 -4000 -1500 1000 3500 6000 8500-20.00
-15.00
90.00 65.00 40.00 15.00 10.00 35.00 60.00 85.00Theta [deg]
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3 D Rad Pattern of the patch; Realized G=6 2dBi3-D Rad. Pattern of the patch; Realized G=6.2dBi
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Feed and Impedance Matching for 1 patch
The patch impedancetransform from 50 to 100 Ohm by ¼ lambda microstrip transformer
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2x2 Patch array with a corporate (parallel) feed2x2 Patch array with a corporate (parallel) feed network and 50-to-100-Ohm transforms
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2x2 Patch: S11=-22 dB @ 10.3 GHz at Array input
-5.00
-2.50Ansoft LLC HFSSDesign1XY Plot 5 ANSOFT
Curve Info
-12.50
-10.00
-7.50
3))
Name X Ym1 10.3000 -22.2623
-20.00
-17.50
-15.00dB(S
(3,
10.00 10.10 10.20 10.30 10.40 10.50 10.60 10.70 10.80Freq [GHz]
-25.00
-22.50m1
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2x2 Patch; Rad. Pattern with realized G=+12.3 dBi;in E and H plane
10.00
15.00Ansoft LLC HFSSDesign1XY Plot 6 ANSOFT
m1Curve Info
0.00
5.00
ainT
otal
)
-10.00
-5.00
dB(R
ealiz
edG
a
Name X Ym1 0.0000 12.3346
-90.00 -65.00 -40.00 -15.00 10.00 35.00 60.00 85.00Theta[deg]
-20.00
-15.00
Theta [deg]
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The corporate network for the 16x16 ArrayThe corporate network for the 16x16 Array
.
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Gain calculation for existing and operating
a 8x8 dipole array
The example of 8x8 Dipole Array above a solid ground plane:
8fc 10.3 109
03 108
fc o=29 mm
Nx 8 Ny 8 d 0.9 0 Gel 2.14 3 dBix y 0 el
Garray Gel 10 log 2 Nx Nyd0
Garray 25.75 dBi
(The declaring max gain of an operating8x8 dipole array is 25 dBi)(The declaring max. gain of an operating 8x8 dipole array is 25 dBi)
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Estimated Array Gain calculation for
the current 16x16 patch array
fc 10.3 109 0
3 108
f o=29mm c 0 fc
Nx 16 Ny 16 d 0.9 0 Gel 6.2 dBi
Garray Gel 10 log 2 Nx Nyd0
0
Garray 32.8 dBi
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Business card