Helical resonator filters with improved multipactor performance exploiting rigorous modelling and the large gap approach - Salza - 2019 - IET Microwaves, Antennas & Propagation - Wiley Online Library
Helical Filters
Helical Filter for 2m - Equipment - SOTA Reflector
Dutch Amateur Radio Station PA2MRX.
Tunable VHF Miniaturized Helical Filters
Coil32 - Helical resonators
TMX324 Toko Helical Filter | eBay
RF/Microwave bandpass filter implementations, Part 3: Microstrip, coaxial, and helical filters
RTL-SDR Filter Cards | Multichannel SDR Transceivers and Audio Arrays
Professional on Custom Helical 5G RF Bandpass Filter, Tunable Bandpass Filter Designing and Manufacturing by Temwell Corporation
Fabricated prototype of the second-order helical resonator filter. | Download Scientific Diagram