Direct Digital Conversion (E7F01)
The 2020-2024 Extra License question pool asks for the definition of direct digital conversion in a software defined radio: E7F01:…
Advanced Topics (24)
dBi vs. dBd (G9C04)
The 2023-2027 General License question pool wants you do differentiate between dBi and dBd when it comes to antenna gain:…
Dipole Impedance (G9B08)
The 2019-2023 General License question pool asks about the effects on impedance of moving dipole antenna's feed point: G9B08: How…
Yagi Antenna Driven Element (G9C02)
The 2023-2027 General License question pool seeks the length of a Yagi antenna's driven element: G9C02: What is the approximate…
Log Periodic Antenna (G9D06)
The 2019-2023 General License question pools asks about the advantage of a log periodic antenna: G9D06: Which of the following…
Antenna Q Factor
You’ve probably heard the term “Q factor” tossed around in describing antennas, but maybe you haven’t quite yet picked up…
Maximum Antenna Structure Height (G1B01)
The 2019-2023 General License question pool asks about the maximum allowable height of antenna structures without requiring special registration or…
The Heterodyne Receiver: Frequency Mixing and the Intermediate Frequency
The challenge faced by a radio receiver after snagging a desired radio frequency (RF) signal is to extract the audio…
