1. Overview of 60 GHz Radio Technology
September 17, 2002
presented before
The Fixed Link Consultative Committee Radiocommunications Agency
presented by
Terabeam Corporation

2. Why 60GHz? FCC Part 15.255 unlicensed spectrum
Available Spectrum: GHz = 7GHz contiguous
Less susceptible to fog than FSO
Interference-free due to high oxygen absorption and narrow beam width
Compact size
Ideal for dense deployment, redundant architectures
Low transmit power limits exposure concerns
High security
Latency-free

3. Why 60GHz? Oxygen Absorption

4. Why 60GHz? Narrow Beam Transmission
Areas of potential in-band interference

5. Why 60 GHz? Dense Deployments

6. Why 60GHz? Compact Antenna Size
Attenna size for a MMW terminal with 44-dBi gain at a 0.9° beam is ten times smaller than that required for a 6 GHz microwave antenna with similar capability
Antenna of equal performance

7. Millimeter Wave Defined2
Signal is converted to millimeter wave, modulated and transmitted at ~ 60 GHz
CUSTOMER DATA 3
Antenna receives the signal and a radio interprets and converts signal to optical 5
Signals transmitted back using the same equipment (full duplex)
Customer network device 1
Optical signal is received from network
Customer network device
MMW is a line-of-sight system that sends data over low-powered radio waves through the air. 4
Optical signal sent back into network via fiber

8. Terabeam Gigalink™ Basics
Fast Ethernet (100 Mbps), OC-3/STM-1 (155 Mbps), OC-12/STM-4 (622 Mbps) speeds
Point-to-point radio system
Requires unobstructed line-of-sight
Reliable for ranges up to 1.25 km
Faded by heavy rain
Integral patch or 13” parabolic antenna for extended range
Turnkey system, delivered complete
Simple, one man installation
Mature product design
Full duplex operation, zero latency

9. Gigalink Design Criteria
Physical layer device (no switch or IP on data payload)
Integrated terminal/antenna, no IDU
Direct fiber interface for data payload and SNMP
Direct Digital Modulation (DDM)
No Forward Error Correction (“FEC”) required
No protocol overhead (no bandwidth waste, latency)
Protocol independent
Plug-and-play simplicity through Gigamon™ alignment utility
Fiber input/output for data and SNMP
Accurate link availability based on statistical data pool
Simple design for manufacturability, reliability and low cost

10. Terabeam Gigalink Gigalink Model Options
Available in Fast Ethernet, OC-3, and OC-12 Speeds
Two antenna options for varying link distances
For short range links
For medium range links

11. Terabeam Gigalink Cost-Effective Outdoor Deployment
Flexible mounting options including poles or towers mounts

12. Gigalink Fast Ethernet/OC-3 Modulation Approach

13. Modulation/Demodulation A Primary Cost Driver
Historically, cost has been the single biggest reason for the lack of MMW Spectrum utilization for commercial uses
For commercial high data rate (>155 Mbps) MMW radios, modulation/ demodulation is the biggest cost drivers:
Coherent modulations requires phase-locked oscillators and phase matched components
-’s: Very high cost, complexity
+’s: High bandwidth utilization
Non-coherent modulations allow the use of free-running oscillators and phase “stable” (vs. “Matched”) components
-’s: Less efficient bandwidth utilization
+’s: Low complexity, lowest cost
Projected Cost vs. Modulation
for 100 Mbps/ GHz 4 3
Relative Costs ($) 2 1
Modulation Types

14. Summary Terabeam’s Affordable & Highly Reliable Gigalink Systems
Ultra-High Data Rate Capability
Flexible Deployment
Affordable
Safe and Secure
Gigabit Ethernet speeds in trial
Up to OC-48 possible in future
High-capacity systems with reliable link ranges
Low probability of interference
Designed for dense deployments
Mature, cost-effective system design
Simple, one-person installation
Protocol independent
Patented Direct Digital Modulation
Low amounts of energy emission
Field-proven product line
Remote management via SNMP data

15. Supporting Slides

16. Terabeam Gigalink Ranges by Region North America
based on 10-9 BER
The ranges listed are generalized for a specific rain region and availability. Actual results may vary.

17. Terabeam Gigalink Ranges by Region Europe
based on 10-9 BER
The ranges listed are generalized for a specific rain region and availability. Actual results may vary.

18. Gigalink 13” Parabolic Antenna Pattern (E-Plane)

19. Gigalink 13” Parabolic Antenna Pattern (H-Plane)

20. Gigalink Family of Radios
Gigamon™ Monitoring Screen

21. Deployment History 1995 Tokyo OC3 Beta Site, (7) OC3 Links
1999 EMC Campus (4)OC3 (6) OC12 Links
Oct Harmonix obtains FCC part 15 Cert.
2000 E-xpedient Miami, (20) 100FX Links
2001 Debut of Wireless Production video link
2002 FSO Hybrid Links (Cogent, Sprint)
2002 will deploy world’s first “GigE” RF Link

22. Case Study: Terabeam MMW & e-xpedient
E-xpedient needed to build metro area network in Miami, FL in a dense configuration and rapid timeframe.
Used Terabeam MMW systems to build the MAN
2 transport rings
6 – 60 GHz MMW radio links
6 – Laser link backups
2 – 38 GHz radio links

23. Deployment History
60 GHz with FSO Backup (Miami Network)

24. Deployment History OC-12 Production Video Remote Backhaul Radio
National Association of Broadcasters (NAB) Debut

25. Maximum Link Distance vs. Weather Conditions

26. Attenuation Due to Fog

27. Attenuation vs. Rain Rate