In one embodiment, an air loop antenna is coupled to a transformer to form an integrated antenna assembly. This integrated air loop antenna and transformer antenna assembly can then be connected to a radio device having antenna connections.Hu, Zhiqi...
Connection of the transformer is easy. Select two of the six wires, based on the known impedance of the antenna, or through experimentation. The antenna wire and ground wire are connected to these two wires. To provide strain relief, they should be ...
DC ground loops can be eliminated by disconnecting the third wire on the oscilloscope (its called a cheater plug, and my lawyers will not let me recommend it!) or by the use of an isolation transformer in the oscilloscope power connection. Another source of circulating current in the probe ...
The passive loop that I built was nothing more than a left over piece of heliax that I had laying around and a matching transformer which I spun myself on a toroid. That antenna actually worked pretty well and was my test antenna to determine if I wanted to invest the money into a ...
Continue reading“A Remotely Tuned Magnetic Loop Antenna”→ Loop Antenna Is Portable February 25, 2017byAl Williams15 Comments We don’t know if [OH8STN] has a military background, but we suspect he might since his recent post is about a “DIY Man Portable Magnetic Loop Antenna.”“Man-...
while the shield and center conductor at the other ends are cross-connected. A 1:1 transformer is wound on a toroid core to connect to the feedpoint; [Thomas] calls it a balun but we tend to think it’s more of an unun, since both the antenna and feedline are unbalanced. He repor...
This paper designs a novel impedance transformer used for low frequency, performing 150 Ω at the input to 50 Ω at the output within the range of 0.1 GHz to 3 GHz. The novel impedance transformer is characterized by band-notch function through loading the technology of curving split rectangula...
An antenna is disclosed that is especially useful for radiating and receiving non-sinusoidal electromagnetic waves. The antenna is an efficient and distortion-free radiator of electromagnetic pulses that do not use a sinusoidal carrier. The antenna's siz
9230-1 Loop Antenna, RS101 ♦ Application Information item # page links 7021-1 Phase Shift Network 7429-1 Loop Antennas 9229-1 9230-1 Loop Antennas 7115-2 Using Type 7115-2 High Voltage Transient Pulse Transformer 7415-3 RF Coupler and High Pass Filter 6220-1B Application Note AN62200...
A VHF television receiving antenna arrangement includes a cabinet having a loop of electrically conductive material disposed on its top, back and sides, preferrably on the inside surfaces thereof. A g