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2. Quarter-wave impedance transformer - Wikipedia

   en.wikipedia.org/wiki/Quarter-wave_impedance...

   The quarter wave transformer is an alternative to a stub; but, whereas a stub is terminated in a short (or open) circuit and the length is chosen so as to produce the required impedance transformation, the λ/4 transformer is in series with the load and its length and characteristic impedance are designed to produce the required impedance ...

3. Joint Tactical Radio System - Wikipedia

   en.wikipedia.org/wiki/Joint_Tactical_Radio_System

   AMF will provide a four-channel, full duplex, software-defined radio integrated into airborne, shipboard, and fixed-station platforms, enabling maritime and airborne forces to communicate seamlessly and with greater efficiency through implementation of five initial waveforms (i.e., Ultra-High Frequency Satellite Communications, Mobile User ...

4. Electromagnetic spectrum - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_spectrum

   12.4 μeV UHF Ultra high frequency: 1 m: 300 MHz: 1.24 μeV Radio waves [11] VHF Very high frequency: 10 m 30 MHz 124 neV: HF High frequency: 100 m 3 MHz 12.4 neV MF Medium frequency: 1 km: 300 kHz: 1.24 neV LF Low frequency: 10 km 30 kHz 124 peV: VLF Very low frequency: 100 km 3 kHz 12.4 peV 3 Band 3: 1 Mm: 300 Hz: 1.24 peV 2 Band 2: 10 Mm 30 ...

5. Waveform - Wikipedia

   en.wikipedia.org/wiki/Waveform

   A sine, square, and sawtooth wave at 440 Hz A composite waveform that is shaped like a teardrop. A waveform generated by a synthesizer. In electronics, acoustics, and related fields, the waveform of a signal is the shape of its graph as a function of time, independent of its time and magnitude scales and of any displacement in time.

6. Very low frequency - Wikipedia

   en.wikipedia.org/wiki/Very_low_frequency

   The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters (an obsolete metric unit equal to 10 kilometers). Due to its limited bandwidth , audio (voice) transmission is highly impractical in this band, and therefore only low- data-rate coded signals are used.

7. Category:Waveforms - Wikipedia

   en.wikipedia.org/wiki/Category:Waveforms

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

8. Wavelength-division multiplexing - Wikipedia

   en.wikipedia.org/wiki/Wavelength-division...

   In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors) of laser light. [1]

9. Channel sounding - Wikipedia

   en.wikipedia.org/wiki/Channel_sounding

   Channel sounding is a technique that evaluates a radio environment for wireless communication, especially MIMO systems. Because of the effect of terrain and obstacles, wireless signals propagate in multiple paths (the multipath effect).