TechLibrary

Antennas and Propagation
Yagi design	Yagi stacking
Original Yagi Uda paper	Stacking dissimilar Yagis - WA5VJB
Log-Periodic design	Helical collinear (H-polarized) omni - K5TRA
6M phase steerable 2x2 endfire array - K5TRA	Circular collinear (H-polarized) omni - K5TRA
Isolation VS horizontal spacing	Isolation VS vertical spacing
Estimating Path Loss	Field Strength - Sensitivity
Ground Gain	Slotted Cylindar Antennas
Long Slot Antennas	Alford Slot Antenna - SM6PGP
Linear Arrays - K5TRA

Broadband Z-Matching	Broadband Amplifier Design Techniques - K5TRA

Cavity and Combline Filters, Combiners, and Duplexers

Filters, Combiners, and Duplexers - K5TRA Narda Combline 900 MHz Duplexer - K5TRA

Motorola T-1500 UHF Duplexers Transformers, Splitter-Combiners, and Hybrids - K5TRA

Central States VHF Society Conference - 2014 Austin, TX

Conference Proceedings 1296 MHz Remote PA & LNA - K5TRA

Conference Presentations Common Design for 6M to 33CM Beacons - K5TRA

Coax
Various coax specs

Equalizers & Attenuators
Design of matched equalizers

Filters

Microwave Filters - an Overview Bandpass Filters

Hairpin Combline BPF Zig-Zag Hairpin Combline BPF

Interdigital BPF Interdigital Equivalent

Narrow Bandstop Exact Bandstop

Ceramic Resonator BPF - K5TRA Enclosure Effects

Multiplexers Lumped Manifold Multiplexer

Contiguous-Channel Multiplexers Evanescent Mode Circular WG Filter - K5TRA

HBT Ballast
HBT Ballast Design - K5TRA

K5TRA MMICs (published / non-proprietary)

A Compact High Gain 2-20 GHz Amplifier GaAs MMIC Transceiver for 2.4 GHz

VSAT MMIC Chip-set 2.4 and 5.8 GHz MMIC PAs

High Performance 6-18 GHz 2W PA - K5TRA RFIC Symposium Workshop: Switched Doherty PAs

Switched Doherty PAs for CDMA & WCDMA Efficient Tri-State PA

Motorola App Notes

AN267 Matching Network Design with Computer Solutions AN593 Broadband Linear Pushpull Power Amplifiers

AN721 Impedance Matching Networks for RF Power Transistors AN749 Broadband Transformers and Power Combiners

AN860 Power MOSFETS vs BIPOLAR Transistors AN1034 Three Balun Designs for Pushpull Amplifiers

AN1526 RF Power Device Impedances: Practical Considerations AN1539 An IF Communication Circuit Tutorial

AN1639 Phase Noise Measurement using Phase Lock Technique AN1643 RF LDMOS Optimum Biasing

Noise Figure

Noise Figure Primer Noise Figure Measurements with Spectrum Analyzer

Power Amplifiers

RF Power Transistors & Amplifiers PA Design Fundamentals

RF Power Amplifier Design PushPull PA IC's and Modules - K5TRA

LDMOS Ruggedness Reliability LDMOS SOA Considerations

LDMOS Power Microwave Applications 50V RF LDMOS

Quasi-Lowpass (allpole) Z-Matching Circuit Design

Chebyshev Quasi-LP Design with Lumped LC Butterworth Quasi-LP Design with Lumped LC

Chebyshev Quasi-LP Design with Distributed Elements Reactance Absorption in Quasi-Lowpass Z-Matching Circuits

RF Transformers

Wideband Transformers Broadband Transformers - Ruthroff

Transmission-Line Transformers - K5TRA

Smith-Chart Z-Matching

Board Level Impedance Matching - slides Board Level Impedance Matching - manuscript

Color Smith Chart 8.5"x11" Form 1296 MHz PreDriver (+31 dBm) Z-Matching - K5TRA

Waveguides - Rectangular, Circular, Transitions

Circular Waveguide Circular Waveguide Analysis

Circular Waveguide to Coax Transitions Waveguide to Coax Transitions

Waveguide Technology Rectangular and Circular Waveguides

Waveguides

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33cm FM
70cm FM
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Motorcycle Mobile
Design Aids

K5TRA

Filters, Combiners, and Duplexers - K5TRA	Narda Combline 900 MHz Duplexer - K5TRA
Motorola T-1500 UHF Duplexers	Transformers, Splitter-Combiners, and Hybrids - K5TRA

Conference Proceedings	1296 MHz Remote PA & LNA - K5TRA
Conference Presentations	Common Design for 6M to 33CM Beacons - K5TRA

Filters
Microwave Filters - an Overview	Bandpass Filters
Hairpin Combline BPF	Zig-Zag Hairpin Combline BPF
Interdigital BPF	Interdigital Equivalent
Narrow Bandstop	Exact Bandstop
Ceramic Resonator BPF - K5TRA	Enclosure Effects
Multiplexers	Lumped Manifold Multiplexer
Contiguous-Channel Multiplexers	Evanescent Mode Circular WG Filter - K5TRA


A Compact High Gain 2-20 GHz Amplifier	GaAs MMIC Transceiver for 2.4 GHz
VSAT MMIC Chip-set	2.4 and 5.8 GHz MMIC PAs
High Performance 6-18 GHz 2W PA - K5TRA	RFIC Symposium Workshop: Switched Doherty PAs
Switched Doherty PAs for CDMA & WCDMA	Efficient Tri-State PA

Motorola App Notes
AN267 Matching Network Design with Computer Solutions	AN593 Broadband Linear Pushpull Power Amplifiers
AN721 Impedance Matching Networks for RF Power Transistors	AN749 Broadband Transformers and Power Combiners
AN860 Power MOSFETS vs BIPOLAR Transistors	AN1034 Three Balun Designs for Pushpull Amplifiers
AN1526 RF Power Device Impedances: Practical Considerations	AN1539 An IF Communication Circuit Tutorial
AN1639 Phase Noise Measurement using Phase Lock Technique	AN1643 RF LDMOS Optimum Biasing

Noise Figure
Noise Figure Primer	Noise Figure Measurements with Spectrum Analyzer

Power Amplifiers
RF Power Transistors & Amplifiers	PA Design Fundamentals
RF Power Amplifier Design	PushPull PA IC's and Modules - K5TRA
LDMOS Ruggedness Reliability	LDMOS SOA Considerations
LDMOS Power Microwave Applications	50V RF LDMOS

Chebyshev Quasi-LP Design with Lumped LC	Butterworth Quasi-LP Design with Lumped LC
Chebyshev Quasi-LP Design with Distributed Elements	Reactance Absorption in Quasi-Lowpass Z-Matching Circuits

RF Transformers
Wideband Transformers	Broadband Transformers - Ruthroff
Transmission-Line Transformers - K5TRA

Smith-Chart Z-Matching
Board Level Impedance Matching - slides	Board Level Impedance Matching - manuscript
Color Smith Chart 8.5"x11" Form	1296 MHz PreDriver (+31 dBm) Z-Matching - K5TRA


Circular Waveguide	Circular Waveguide Analysis
Circular Waveguide to Coax Transitions	Waveguide to Coax Transitions
Waveguide Technology	Rectangular and Circular Waveguides
Waveguides