Highly Integrated Millimeter-Wave Passive Components Using 3-D LTCC System-on-Package (SOP) Technology

1
Highly Integrated Millimeter-Wave Passive
Components Using 3-D LTCC System-on-Package
(SOP) Technology

• J. -H. Lee and M. M. Tentzeris
• jonglee_at_ece.gatech.edu

School of ECE, Georgia Institute of Technology,
Atlanta, GA, U.S.A.
2
Content

• Motivation
• SOP 3-D Concept
• 60 GHz Patch Resonators
• 60 GHz 3-pole Patch Filters
• Future Work

3
Motivation

• Advanced millimeter-wave system on package (SOP)
  architectures for RF modules
• Slotted compact patch BPFs for mobile
  communication systems such as wireless broadband
  internet or inter-satellite communications
• Compact 40GHz directional filters for mixer
  applications

4
SOP 3D Integration Concept

• Lower Cost
• Smaller Size
• Better Performances
• Multi Functionality

Filter
Antenna
3D module for OFDM with embedded filter and
antenna
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60GHz Compact Patch Resonators/Filters
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Miniaturization I (Vertical Coupling)

• Patch Using
• Vertical Coupling

• ?/2 Square Patch

(0.996 mm 0.996 mm)
(0.996 mm 0.996 mm)
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Miniaturization II (Transverse Cuts)
L
Lover
(0.996 mm 0.996 mm)
(0.996 mm 0.996 mm)
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LTCC Based Patch Resonator (er5.4, tand0.0015)

• Top View

• Side View

L Lcl Lcw Lover Ls
60 GHz (µm) 616 205 75 88 75
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Simulation Measurement Results
Center Frequency 59.3 GHz, Ql59.5
Meas. Sim.
fo (GHz) 59.3 59.85
IL (dB) 2.3 2.1
RL (dB) 25.3 17.5
3-dB BW () 1.68 1.67
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Design of LTCC 3-pole Patch Filter
Qext vs. Lover

• ltChebyshev Lowpass Prototypegt
• fo 59.6 GHz
• Band ripple 0.1dB
• 3-dB BW6.4

k12 vs. d12

• Qext 15.4725

• k12 k23 0.06128

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Design of LTCC 3-pole Patch Filter

• Top View

d23
d12
Lover
Lover d12 d23 size
3-Pole (mm) 0.052 0.223 0.223 5.8 1.1 0.3

• Side View

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Simulation Measurement Results
LTCC 3-Pole Patch Filter, Ql 15.1
Meas. Sim.
fo (GHz) 59.1 59.6
IL (dB) 1.23 1.1
RL (dB) 14.11 9.8
3-dB BW () 6.6 6.4
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Future Work
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LTCC 5-pole Filter

• Top View

Lover d12 d23 d34 d45 size
5-Pole (mm) 0.093 0.151 0.22 0.22 0.151 7.925 1.140 0.3

• Side View

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Directional Filter
Input
Bandpass

• Multilayer LTCC process
• Implementation at 40GHz
• Ring resonator in metal 2 layer
• Filter thickness 200?m

Metal1
Band reject
Metal2
Ground plane
Filter
thickness

• Vertical coupling between metal1 and metal2
  layer utilized for signal coupling
• Microstrip feeding

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Conclusions

• Compact patch resonator at 60 GHz has been
  demonstrated with low insertion loss (2.3 dB) and
  narrow bandwidth (1.68).
• Multistage (3-pole) band pass filters have
  demonstrated performances suitable for V-band
  mobile communication and inter-satellite wideband
  applications.
• 5-pole band pass filters and directional filters
  will be experimentally verified with the
  experimental results within two months.