wimax vs. lte - tmcnet(mimo antenas)

8/2/2019 Wimax vs. Lte - Tmcnet(Mimo Antenas)

1/11

2003 SkyCross. All Rights Reserved.

4G2-01WiMAX vs. LTE

Implications for Practical

Device ApplicationsPaul Tornatta, CTOSkyCross Inc.January 20, 2010


2/11

Wireless Without Limits COMPANY CONFIDENTIAL

Agenda

SkyCross Company Introduction

LTE vs. WiMAX in North America

- Frequency Allocation

- Range loss

- User Platform Consideration

Summary

Conclusions


3/11

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 globaldesignerandmanufacturerof one-stop

antenna solutionsfor a variety of wireless devices


4/11


Markets Served

AND MORE

our technology isversatile!

USB dongle

Wireless Audio

PC CardPersonal Media/Game Players

LaptopUltra-mobile PC

FemtocellHandsets Smart GridSmartphoneRouter/AccessPoint

Networking

Computing

Personal NavigationDevice

Home Entertainment

Mobile Phones

Personal/Home Entertainment

Our multi-band/mode antennas enable increased functionality voice, data, video, location, audioin any wireless device without compromising style.
http://www.gadgetreview.com/wp-content/uploads/2006/07/d-link-phone.jpghttp://images.google.com/imgres?imgurl=http://elearningstuff.files.wordpress.com/2008/01/asus-eee-pc-at-newegg.jpg&imgrefurl=http://elearningstuff.wordpress.com/2008/01/24/asus-release-eee-pc-in-japan-with-windows-xp/&h=344&w=409&sz=30&hl=en&start=16&tbnid=rtu76_MZeeCeyM:&tbnh=105&tbnw=125&prev=/images%3Fq%3DAsus%2BEee%2BUMPC%2B%26gbv%3D2%26hl%3Denhttp://www.woot.com/Images/Sale/_Netgear_802.11g_Wireless_USB_2.0_Adapter_-_2_Pack-detail.jpg


5/11


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 havesimilar spectral efficiency WiMAX implementation in North America has a significant

advantage in total bandwidth available to service a largenumber of customers


6/11


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


7/11Wireless Without Limits COMPANY CONFIDENTIAL

MIMO Antenna Implementation Issues

MIMO antenna performance is greatly effected by devicegeometry

Handset geometries are small in terms of wavelength inthe 700 MHz band making it difficult to implement MIMOantennas

Handset geometries are larger in terms of wavelength at2600 MHz making MIMO antenna implementation morepractical

Freespace Wavelengthat 2600 MHz ~ 115 mm

Freespace Wavelengthat 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



Simulation - 700 MHz MIMO HandsetAntenna Implementation

VSWR: 0.8Coupling:

-4dB

Patternsalmostidentical



Simulation - 700 MHz MIMO Handset AntennaImplementation Isolated Mode Technique

VSWR



Summary / Conclusions

LTE 700 is capacity limited for a given data rate

WiMAX at 2.6 GHz is range limited for a givendata 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 andcapacity

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



Thank You!

Page 11

wimax vs. lte - tmcnet(mimo antenas)

Documents