Frequency Spectrum Antennas and Amateur Radio Troy Rank

Frequency spectrum u Focus On: • HF – High Frequency • VHF – Very

HF u Frequency Range • 3 -30 MHz u Who Uses HF? • Military

HF - Modes u Analog Modes • AM, USB, LSB, CW u Digital Modes

VHF/ UHF VHF 30 -300 MHz u UHF 300 MHz - 3 GHZ u

VHF/UHF Applications FM broadcast Radio u Broadcast TV u Local Radio Communication u •

UHF/VHF modes FM, USB, LSB, AM (on lower freqs) u Digital modes u •

UHF/VHF Repeaters u Retransmit signals • Longer usable range u u u Receive on

IRLP u Internet Radio Linking Project • Connects Repeaters • Uses Internet For connection

Amateur Satellite VHF for transmit u UHF for receive u Types u • Repeaters

Beyond UHF 3 -300 GHZ (Microwave region) u Large Bandwidth u Highly subject to

Applications 3 -300 GHZ Wireless Data Links u Broadband Internet links u • Large

What is Amateur Radio Hobby u Provide Emergency Communication u • Much more resilient

How to Become a Ham u Three License Classes • Technician • General •

Dipole Antenna 2. 4 DB gain for ¼ wave u ¼, ½, 5/8, wave

Other Types Of Antennas Loop u Yagi u Cubical Quad u Ground Plane u

Aperature u Commonly used for microwave freqs

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Frequency Spectrum , Antennas, and Amateur Radio Troy Rank

Frequency spectrum u Focus On: • HF – High Frequency • VHF – Very High Frequency • UHF – Ultra High Frequency • Lower Microwave Frequencies

HF u Frequency Range • 3 -30 MHz u Who Uses HF? • Military • Marine • Aeronautical • Radio Amateurs • World Band Radio

HF - Modes u Analog Modes • AM, USB, LSB, CW u Digital Modes • SSTV (slow scan tv) • Amtor / Pactor • RTTY • PSK 31 • We. Fax • BPL?

VHF/ UHF VHF 30 -300 MHz u UHF 300 MHz - 3 GHZ u Short Range u No Ionospheric propagation u Who uses VHF/UHF u • Who Doesn’t?

VHF/UHF Applications FM broadcast Radio u Broadcast TV u Local Radio Communication u • Police • Commercial Cell Phones u Satellite Communications u 802. 11 b/g u

UHF/VHF modes FM, USB, LSB, AM (on lower freqs) u Digital modes u • Packet Radio • Digital Voice • IRLP • APRS

UHF/VHF Repeaters u Retransmit signals • Longer usable range u u u Receive on one Frequency Transmit on a separate Frequency Intermodulation • Duplexers

Duplexers

IRLP u Internet Radio Linking Project • Connects Repeaters • Uses Internet For connection

Amateur Satellite VHF for transmit u UHF for receive u Types u • Repeaters • Digipeaters • Other data

Beyond UHF 3 -300 GHZ (Microwave region) u Large Bandwidth u Highly subject to line of sight u Very low power u • Health hazard u Highly directional signals used

Applications 3 -300 GHZ Wireless Data Links u Broadband Internet links u • Large bandwidth Radar u Wireless USB u

Amateur Microwave u Contesting

What is Amateur Radio Hobby u Provide Emergency Communication u • Much more resilient than convention telephone lines / cell phones u Experiment with new forms of RF communication

How to Become a Ham u Three License Classes • Technician • General • Extra u Take a Written Multiple Choice Test

Dipole Antenna 2. 4 DB gain for ¼ wave u ¼, ½, 5/8, wave versions u

Other Types Of Antennas Loop u Yagi u Cubical Quad u Ground Plane u Aperature u Crossed Yagi u Helix u

Yagi

Aperature u Commonly used for microwave freqs

Ground Plane u Omni directional

Crossed Yagi and Helix