1. Johanson Technology Inc. 4001 Calle Tecate Camarillo, CA 93012
LTCC Chip Antennas – How to maximize performance Johanson Technology Inc.
Johanson Technology Inc Calle Tecate Camarillo, CA 93012
Your first slide must be the title slide. The suggested format is shown above. (You may adapt this slide to suit your tastes.) It is recommended that your company or university logo appear on the title slide only. This is followed by your outline slide and the other slides mentioned in this template.
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Joseph F. White, “Your Paper Has Been Accepted!”, Applied Microwave & Wireless, Winter 1996, pp

2. Outline Goal  To Maximize Performance Chip Antenna Characteristics
Antenna Selection Considerations
Circuit Design Constraints
Layout Tips
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished.
Goal  To Maximize Performance

3. Motivation
Chip Antenna an efficient means of “connectivity” to modern portable electronic devices.
Miniature portable devices requires small antennas.
Can be internalized – i.e. “Concealed” within device.
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4. Pros Cons Chip antennas are small, cheap and performs well.
Bulky external “whip” type antenna thing of the past.
Cons
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Must be accounted for during initial circuit design stage
Interference, proximity de-tuning & degradation concerns.

5. LTCC Chip Antenna
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6. Chip Antenna Characteristics -1
Features Ag radiating element encapsulated in ceramic.
A quarter-wave ( λ/4 ) monopole system.
Works with GND plane to form dipole system.
Certain “No_GND” space necessary.
Small form factor, thin profile & light weight
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished.

7. Chip Antenna Characteristics - 2
Omni-directional diversity.
Linear Polarization.
Mounting configuration flexibility.
Frequency range supported: 0.8 GHz thru 10 GHz.
WiFi, BT, WiMAX, UWB, GSM, CDMA, GPS etc.
Suitable for Pick & Place.
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished.

8. Antenna Selection Considerations -1
Size
Frequency Band
Bandwidth
Polarization
Peak Gain
Ave Gain
Radiation Diversity Pattern
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished.

9. Antenna Selection Considerations -2
Successful Antenna design means harmonious interaction of the “seven” parameters.
Additional considerations for diversity systems
– e.g. MIMO
Overall performance is also system dependent .
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished.

10. Circuit Design Constraints
Size of the Circuit board.
Layout of the other board components.
Complexity of circuit.
Proper GND/No-GND dimensions.
“Tuned” Matching Circuitry
Shielding
Suitable Enclosure (material)
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished.

11. Layout Tips -1      Good Placements  Bad Placements  & 
GND-bottom layer   
GND-top layer 
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished. 
No ground area (yellow area)
Good Placements 
Bad Placements  & 

12. Layout Tips -2
Don’t put the metal plate or battery above or below the yellow region
Keep away any other metals from clearance area.
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Ground

13. Layout Tips -3 Further examples of good antenna placement schemes GND
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GND
Further examples of good antenna placement schemes

14. Layout Tips -4 Antenna placement schemes for Diversity systems
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished.
Antenna placement schemes for Diversity systems

15. A. Antenna Matching Setup
Test Board
GND
50 W Feed line
NO GND
p-type Matching Pads
Probe
Soldering to Connect Probe_GND and PCB_GND
Calibration Plane of Network Analyzer(NA)

16. B. Measuring Steps 1. One port calibration for NA Open-Short-Load
Mount probe onto PCB and connect to NA
3. Measure S11 of test board without antenna
S11_open save trace to memory of NA
4. Measure S11 of test board with antenna and 0 W R mounted
S11_antenna
5. Set NA to data/memory mode (S11_antenna/S11_open)
S11_match
6. Match the trace of S11_match to 50W
(center of Smith chart at the desired frequency)

17. Antenna Matching Example
1. Probe+Feed Line

18. Antenna Matching Example
2. Probe+Feed Line (normalized)

19. 3. Antenna
(not normalized)
(normalized)

20. 4. Ant+shunt 3.9nH (normalized)

21. 4. Ant+shunt 3.9nH+series 1.5pF (normalized)

22. Matched Antenna Example
2450AT43A100
8.2nH
0.8pF
4.7nH
Semi-rigid connector

23. Conclusion – How to design
1st – Determine the antenna location on board
2nd – Select the most appropriate antenna model
3rd - Implement antenna in conformance with design rules
Outline the high points of the presentation you are giving. Don’t include the title or conclusion in your outline. You should state the purpose of the work described in your paper. Describe the big picture of why you did the work, not the detailed technical objectives your work accomplished.