©2003 SkyCross. All Rights Reserved.

4G2-01WiMAX vs. LTE

Implications for Practical Device Applications

Paul Tornatta, CTOSkyCross Inc.January 20, 2010

Wireless Without Limits COMPANY CONFIDENTIAL

Agenda

• SkyCross Company Introduction

• LTE vs. WiMAX in North America- Frequency Allocation

- Range loss

- User Platform Consideration

• Summary

• Conclusions

Wireless Without Limits COMPANY CONFIDENTIALPage 3

• Founded in 2000• Headquarters in Viera, Florida

- Global Locations: China, Korea, Japan, Taiwan• Privately held with strong financial partners

- Intel Capital- Investor Growth Capital: > $1B investments- TL Ventures: > $1.5B under management

• 4-Yr Revenue Growth 55% CAGR• > 500 Employees• Strong IP Portfolio >140 Global Patents

About Us

SkyCross is a global designer and manufacturer of one-stop antenna solutions for a variety of wireless devices

Wireless Without Limits COMPANY CONFIDENTIAL

Page 4

Markets Served

AND MORE –

our technology is versatile!

USB dongle

Wireless Audio

PC CardPersonal Media/Game Players

LaptopUltra-mobile PC

FemtocellHandsets Smart GridSmartphoneRouter/ Access Point

Networking

Computing

Personal Navigation Device

Home Entertainment

Mobile Phones

Personal/Home Entertainment

Our multi-band/mode antennas enable increased functionality – voice, data, video, location, audio – in any wireless device without compromising style.

Wireless Without Limits COMPANY CONFIDENTIAL

4G Frequency Allocations

Carrier Application Band Bandwidth

Verizon LTE Band 13 20 MHz

AT&T LTE Band 17 24 MHz

Clear WiMAX Band 7 120 MHz

• LTE and WiMAX use similar modulation schemes and have similar spectral efficiency

• WiMAX implementation in North America has a significant advantage in total bandwidth available to service a large number of customers

Wireless Without Limits COMPANY CONFIDENTIAL

Range Loss Comparison – 700 MHz vs. 2600 MHz

• LTE in North America is implemented in the 700 MHz band• WiMAX is implemented in the 2600 MHz band• LTE has a significant advantage in coverage range and

footprint over WiMAX

Range

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

0 1 2 3 4 5 6 7 8 9

Distance (km)

dBm

750 MHz

2600 MHz

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MIMO Antenna Implementation Issues

• MIMO antenna performance is greatly effected by device geometry

• Handset geometries are small in terms of wavelength in the 700 MHz band making it difficult to implement MIMO antennas

• Handset geometries are larger in terms of wavelength at 2600 MHz making MIMO antenna implementation more practical

Freespace Wavelength at 2600 MHz ~ 115 mm

Freespace Wavelength at 750 MHz ~ 400 mm

L=110 mm

w=60 mm

Maximum Dimension Resonance = 1150

MHz

What works for 3G will not be good enough for 4G

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Simulation - 700 MHz MIMO Handset Antenna Implementation

VSWR: <2:1 Efficiency:

30-40%

CC: >0.8Coupling:

-4dB

Patterns almost

identical

Wireless Without Limits COMPANY CONFIDENTIAL

Simulation - 700 MHz MIMO Handset Antenna Implementation – Isolated Mode Technique

VSWR <2.2:1

Isolation:

<-13 dB

Efficiency 50-58%

CC: <0.35

Significantly different patterns results in low envelope correlation

coefficient

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Summary / Conclusions

• LTE 700 is capacity limited for a given data rate

• WiMAX at 2.6 GHz is range limited for a given data rate

• 700 MHz MIMO handset antenna implementation requires specialized techniques

• WiMAX and LTE each have benefits and drawbacks

• WiMAX and LTE will likely coexist each filling particular needs for data rates, coverage and capacity

What works for 3G will not be good enough for 4G

Wireless Without Limits COMPANY CONFIDENTIAL

Thank You!

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