Hits
Development of a 23cm patch antenna
Looking for a robust design for a portable antenna to use with my new DJ-G7E, I decided to try a microstrip patch.This is just a precisely-shaped conductive plate suspended above a ground-plane; but by using PCB techniques, this becomes a simple rectangular "flat-panel" antenna
post 23 Apr 2024
Antenna 23cm 1.2 GHz Links →
1.2 GHz FM Wireless SpyCam
This camera did not include audio, but the circuit board is obviously the same one used for cameras with a mic
10 GHz waveguide slot antenna
A slotted waveguide antenna works by radiating energy from the inside though a number of slots cut in the waveguide
10 Elements Yagi Directional Antenna for 23cm
For ATV transmission in the 23cm band from our club station
20-turn helix antenna for 23 cm
Design of a 10 GHz beacon antenna. A standard WG16 waveguide is used
23 cm Hybrid-Quad von
Some time ago I experimented with double quad antennas in the 23cm band, and I found that the resulting gain in terms of material expenditure is very large, and the broadband nature of such antennas for ATVs is almost the same
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This camera did not include audio, but the circuit board is obviously the same one used for cameras with a mic
A slotted waveguide antenna works by radiating energy from the inside though a number of slots cut in the waveguide
For ATV transmission in the 23cm band from our club station
Design of a 10 GHz beacon antenna. A standard WG16 waveguide is used
Some time ago I experimented with double quad antennas in the 23cm band, and I found that the resulting gain in terms of material expenditure is very large, and the broadband nature of such antennas for ATVs is almost the same
Linear loaded short dipole 21Mhz For my amateur radio activities on the HF bands I only have a 3.6 m wide balcony available for antennas. After some study I decided to experiment with a shortened dipole for the 15 m band
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
A simple SWR Meter is to be used at HF An SWR meter provides information about how well matched is your antenna with the transmitter and how well power is being radiated