phase arrays

2 Stack Match Yagi Antenna - Solves antenna matching problem with two phased antennas. Stacked rotary beams are popular. However, connecting two 50 Ohm antennas together presents some problems.

Phased 40M Wire Verticals - Experiments with phased wire vertical antennas on 40 meters at VA7ST

4 Square antenna for 80 meters - Four phased vertical antennas on 80 meter band

Vertical phased Array - A SM3HXD vertical phased array antenna system

The 4-Square Site - 4 Square Vertical Array website dedicated to vertical arrays antenna installations worldwide by G4ATA

Multi-loop Rectangles and Compact Arrays - VHF antenna array that packs a lot of gain into a small volume article by N2DT

Superphaser-2 Phasing Unit - The Superphaser-2 is an antenna phasing unit based on the PSA-A Phase Shift Amplifier module

G3WZT Phased Verticals - Vertical phased antenna systems plans by G3WZT

Phased Array Adjustment - KM5KG article presents a lumped-parameter tee-network model of the coupling between radiating elements in a phased array in order to provide a physical and intuitive understanding of phased array operation and adjustment interactions

Bobtail dipole - Bobtails are vertical arrays that look like the letter "E" turned 90° clockwise onto its tails. They have 3 quarter wave vertical elements and are one wavelength long. The Half Square is a shortened Bobtail- it has 2 quarter wave vertical elements and is a half wave long.

Baluns on Log Periodic Antennas - Some antenna manufacturers place baluns at the incorrect location in LPDA arrays, or tell you to route the cable incorrectly. This can cause substantial RFI and all sorts of weird problems like RF into house wiring.

40 meter phased delta loops - N6AQ delta loops antennas for 40 meter band

Boom for phased delta loops - Antenna boom to support 40 meter phased delta loops

Calculating wind loads - Mechanical Notes from K7NV

Curtain Antennas - Lazy H Antenna, Bi-Square, Sterba Curtain, HR, HRS, and USIA Curtain Antenna Arrays at W8JI

Antenna Engineering - Antenna Engineering specialise in producing a range of high quality aluminium HF verticals ranging from mono band single element verticals to multi element phased arrays.

MegaPhase - MegaPhase designs, manufactures and sells coaxial cable assemblies to OEMs building advanced microwave and optical electronic systems, products include test cables, test adapters, flexible and semi-rigid cables used to connect system components inside a system, and coaxial connectors.

Anaren - Manufacturer for splitter and combiners, baluns, directional couplers hybrid couplers, modulators, mixers, phase discriminators, antenna feeds.

Filter Concepts - Custom EMI Filters, AC DC Three phase filters by Filter Concepts Inc.

MFSK16 - An MFSKMulti-Frequency Shift keying DX Mode. A new weak signal DX mode for Radio Amateurs, employing M-ary FSK, phase continous tones and convolutional coded FEC.

Radius Power - DC Filters - DC filters from radius power are specifically optimized for applications with DC supply like e.g. photovoltaic inverters. Radius Power provides total power solutions, EMI filters solutions from design to manufacturing, Three Phase, Single Phase, Power Line, IEC inlet, Power entry modules Filters.

DSPRX - Signalprocessing for SSB - Direct Conversion Receiver using Phasemethod for Sideband Supression, does all necessary signalprocessing for Direct conversion Receivers using IQ-mixer for demodulation.

Cute CW - Most morse code (CW) training requires you to learn everything at once without a training process. This application changes that and separates training into phases.

Double Tone IQ-Generator - Easy to use double tone IQ-generator for testing direct conversion SSB-transmitters based on phasemethod etc.

Noise cancellation on 2m using 2 antennas - Article on Phase-cancellation of noise on 2m band