Microstrip Antennas in mm Waves

Microstrip Antennas
in mm Waves
Ely Levine
Eli Gelbart
Asaf Katz
([email protected])
([email protected])
([email protected])
New Tech May 2015
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OUTLINE
•Background
•Published designs
•Technology Advances
•Series-Fed Design
•Examples
•Measurement Facilities
•Summary
New Tech May 2015
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Background
Increasing demand for mm Waves systems
Frequencies:
38 GHz
Communications, SRD, sensors
60 GHz
Secured Communications, Indoor
77 GHz
Vehicular Radars
94 GHz
Radars, radiometers
Technological Advances:
substrates, etching, connectors, cables, Chips, equipment
New Tech May 2015
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Published Designs
Schoebel 2009
Serial Feeding
Minimal loss in lines
Column width can be /2
Medium quality pattern
Best interface to PCB
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Microstrip Array with Serial Feeding
Schoebel 2009
12 elements in each sub-array
G = 15.3 dBi
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Microstrip Array with Serial Feeding
Schoebel 2009
20 elements in each sub-array
G = 16.5 dBi
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Microstrip Array with Serial Feeding
Schneider 2005
RX
8 lines of 20 EL
90 x 6
TX
1 line of 20X4 EL
26 x 6
21 dBi
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Microstrip Array with Serial Feeding
Sauleau 2010
14 sub-arrays of
12 + 12 elements
Center fed w/taper
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Microstrip Array with Serial Feeding
Papageorgian 2012
16 x 32 elements
33 x 66 mm
27 dBi at 79-80 GHz
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Microstrip Array with Serial Feeding (comb)
Sakakibara 2009
2 x 27 elements
Low SLL
High efficiency
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Serial feeding (crossed elements)
Uezato 2010
Better pattern
Polarization control
0.4-0.6
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Technological Advances
High Quality substrates suitable till 110 GHz
Such as Rogers 3003, Taconic TSM
Accurate Etching (tolerance 0.02 mm)
Cables and Connectors till 110 GHz
Modern measurement equipment
System aspects acknowledged to Dr. Dan Raphaeli
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Etched by Suron
Microscope photos
By Dr. Oz Golan
Line width 0.2 mm
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Series-Fed Design
Line 50-70 
Line 0.1-0.3 mm
Element + line = g
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Series-Fed Designs
Spacing Between
Rows = o/2
Ideal for
Phased Arrays
Minimal Line Losses
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Series-Fed Designs
Side Lobes
can be reduced
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Examples
Microstrip Fixed Beam Arrays
MA77-48EL
MA77-64EL
MA77-96EL
MA77-256EL
MA94-32EL
MA94-128EL
MA94-128EL
MA94-512EL
4x12
8x8
8x12
16x16
4X8
8x16
16x8
32x16
77 GHz Rogers 3003 0.01”
77 GHz
77 GHz
77 GHz
94 GHz Taconic TSM 0.005”
94 GHz
94 GHz
94 GHz
Simulated by HFSS
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77 GHz 48 EL Array
9mm
34mm
21-22 dBi
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77 GHz 64 EL Array
17mm
22-23 dBi
25mm
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77 GHz 96 EL Array
17 mm
34 mm
23-24 dBi
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77 GHz 256 EL Array
35 mm
25-26 dBi
44 mm
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94 GHz 32 EL Array
8 mm
18-19 dBi
18 mm
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94 GHz 128 EL Array
15mm
34mm
23-24 dBi
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94 GHz 128 EL Array
27mm
23-24 dBi
20mm
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94 GHz 512 EL Array
54mm
27-28 dBi
38mm
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Examples
Microstrip Columns for Phased Arrays
MC38-24EL
MC38-32EL
MC38-112EL
MC60-128EL
MC60-192EL
MC60-256EL
MC77-40EL
MC77-48EL
MC77-80EL
MC77-96EL
4x6
4x8
8x14
16x8
16x12
16x16
4x10
8x6
8x10
8x12
38 GHz
38 GHz
38 GHz
60 GHz
60 GHz
60 GHz
77 GHz
77 GHz
77 GHz
77 GHz
Rogers 5880 0.02”
Rogers 3003 0.01”
Rogers 3003 0.01”
Simulated by HFSS
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38 GHz 4X6 EL Array
Inactive elements
Inactive elements
44mm
35mm
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38 GHz 4X8 EL Array
35mm
55mm
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38 GHz 8X14 EL Array
43mm
89mm
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60 GHz 16X8 EL Array
47mm
30mm
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60 GHz 16X12 EL Array
48mm
42mm
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60 GHz 16X16 EL Array
48mm
52mm
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77 GHz 4X10 EL Array
20mm
27mm
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77 GHz 8X6 EL Array
24mm
18mm
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77 GHz 8X10 EL Array
24mm
27mm
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77 GHz 8X12 EL Array
24mm
31mm
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Summary
Technologies have been improved
Facilities enables printed antennas till 110 GHz
Series Fed is an optimal choice (minimal line loss,
convenient line width, best fitted for phased arrays)
Limitations in comparison to parallel fed arrays:
narrow bandwidth, side lobes, squint
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