Search results

The Flower Pot Antenna project details a portable dual-band antenna primarily operating on 10 meters, with secondary resonance near the 30-meter band. Construction involves winding RG58 coaxial cable uniformly around a large plastic flower pot, approximately 70cm high with a 60cm top diameter. The design eliminates the need for radials, contributing to its compact and lightweight nature. Key construction steps include soldering the inner conductor to the shield at one end of the wound cable and connecting the wound cable's shield to the rig cable's inner conductor at the base. An LC network, comprising a variable capacitor (0-200pF) and an inductor (10 coils, 5cm diameter, 2mm wire), is inserted between the wound cable's inner conductor and the rig cable's shield. Tuning is performed with an antenna analyzer, adjusting cable length and the variable capacitor for optimal impedance on 10 meters. The antenna performs effectively when installed horizontally.

This project is an attempt to build a portable standalone VNA (Vector Network Analyzer).

This article describes a low-cost vector network analyzer that operates from 200 kHz to 100 MHz, and connects to a personal computer using a USB 1.1 interface By Tom McDermott, N5EG, and Karl Ireland

60KHz to 60MHz. laboratory quality Vector Network Analyzer project

This program intended for electronic circuit analysis (mainly for Linux). ViPEC is a powerful tool for the analysis of high frequency, linear electrical networks.

Homebrew VNA capable of both transmission and reflection measurements from 0.05 to 60 MHz

Metro Vector Network Analyzer is a custom antenna analyzer designed and produced by IZ7LDG.

New and used test equipment, oscilloscope, spectrum analyzers, multimeters, signal generators, power supplies, network and signal analyzers and more

A 500 kHz to 5.5GHz 2-port vector network analyzer designed for use with any Linux, Windows or MacOS computer. High performance: up to 80 dB dynamic range in the MHz range; up to 40 dB in the GHz range

In this article the author analyze six different type of VHF handheld antennas and as result of his self training on his new vector network analyzer published this interesting report

A calibration kit useful when you need known reference impedances to properly calibrate your vector network analyzers.

Network Analyzer on an Arduino Shield which covers from 0-72MHz using an Analog Devices AD9851 DDS chip

The NanoVNA is a very compact handheld Vector Network Analyzer. The NanoVNA is tiny and portable analyzer, and it offers a high performance capabilities with an embedded lcd display.

TRS RenTelco provides new or used electronic test equipment for rent, lease or purchase. Solutions are provided for various type of equipment such as spectrum analyzers, network analyzers, oscilloscopes etc from leading manufacturers. Our products are widely used in communications, R&D, semiconductor, and wireless industries.

A project by LY3H of a complete Scalar USB network analyzer with freeware windows software, sweep range 100 kHz to 160 MHz, powered by USB.

Very Tiny Palmtop Vector Network Analyzer by edy555. This is the original GitHub firmware repository implementing the standard 50KHz to 300MHz model

Saluki manufacturer of Spectrum Analyzer, Handheld Spectrum Analyzer, Signal Analyzer, Cable and antenna analyzer, Network Analyzer|RF Signal Generator, Cable Antenna Analyzer

SNASharp is a free software application designed to work with scalar network analyzers compatible with NWT software from DL4JAL. It is used to measure and analyze the scattering parameters (S-parameters) of microwave devices. Provide several measurements and analysis tools including Smith chart, Polar plot, S-parameter tables, Transmission line calculator

Hamradio_copilot is an open-source tool designed for DXers and contesters who need real-time situational awareness. It is ideal for operators who want to visualize propagation trends instantly rather than scrolling through raw text streams of cluster spots. Rally acting as a copilot for your station, this tool transforms raw data into actionable intelligence. By visualizing Signal-to-Noise Ratios (SNR) across different bands, it helps operators make quick decisions on which band to prioritize or where to point their antennas, effectively showing not just who is on air, but where the propagation is currently open from your location. This is a fantastic information for avid contesters. The software aggregates data from two primary services: - Reverse Beacon Network (RBN) via Telnet. - PSK Reporter via MQTT feeds. It processes this data to generate a comprehensive HTML report featuring SNR heatmaps and statistical breakdowns by ITU Zone. Users can filter data by specific zones or country codes (ADIF), analyze historic time ranges, and optionally integrate solar weather data. The complete source code is available on GitHub, allowing for community customization. It is written in Python and uses SQLite for data management.

This article published on QEX details measurements of tree conductivity and permittivity at HF frequencies, addressing a long-debated topic in amateur radio. N6LF conducted experimental impedance measurements on Douglas fir and maple trees using a vector network analyzer with rings of nails inserted into tree trunks. Results showed that tree conductivity increases with frequency while relative permittivity decreases, similar to soil characteristics. Measured conductivity ranged from 0.06 to 0.4 S/m at 10 MHz, aligning with values used in previous research. These findings validate that NEC modeling can reliably estimate trees' substantial impact on HF antenna performance.