Frequency Regions
Figure 5: The NN03-320 antenna booster can be used for different and/or multiple bands when fitted with the suitable passive component matching circuit between the RF source and the booster. Image source: Ignion the ground plane as a radiating surface. These passive, surface- mount booster devices offer an alternative to conventional embedded antenna arrangements for IoT devices and smartphones. A single Virtual Antenna device can serve different parts of the RF spectrum, simply by appropriate configuration of its passive matching network.
Class
Frequency Range
More detailed info
1561MHz, 1575MHz, 1598MHz to 1606MHz, and 2400MHz to 2500MHz
2 Ports
4
GNSS + BLUETOOTH
1561MHz, 1575MHz, 1598MHz to 1606MHz
1 Port
3
GNSS
1 Port
1
2400MHz to 2500MHz
BLUETOOTH
1 Port
1
3400MHz to 3800MHz
5G
3100MHz to 4800MHz and 6000MHz to 10600MHz
1 Port
1
UWB
components, while a multiband smartphone might need a couple of boosters and five to eight high-Q components for its matching network. Ignion simplifies the design effort with a free development tool which lets the designer virtually place the booster near the edge of the circuit board, define a “clear” zone around the booster devoid of components, and then calculate the needed passive comments for the matching network. For the multiport NN03-320, the calculated matching networks allow the device to cover multiple bands and applications including GNSS, Bluetooth, 5G and UWB, over frequencies spanning 1561 to 1606 megahertz (MHz), 2400 to 2500 MHz, 3400 to 3800 MHz, 3100 to 4800 MHz, and 6 to 10.6 gigahertz (GHz) (Figure 5). The NN03-320 datasheet specifies the performance of this 50 ohm (Ω) Virtual Antenna booster component and optimized matching network using standard antenna parameters for each band, including efficiency,
peak gain, VSWR, polarization, and radiation pattern. Application notes show typical matching network schematic diagrams like Figure 6, and include a table of suggested passive component values for each desired frequency span. While these values serve as starting points, they will need to be tweaked to account for unanticipated parasitics, as well as the effects of nearby components such as displays or ICs. Conclusion Antenna boosters such as these from Ignion represent a different way of radiating RF energy by using
Recommended Reading
1. Yagi, Hidetsu; Uda, Shintaro, Proceedings of the Imperial Academy (February 1926). “Projector of the Sharpest Beam of Electric Waves” (PDF). 2. Air Force Magazine, “How the Skunk Works Fielded Stealth ”
3. Ben Rich, “Skunk Works: A
Personal Memoir of My Years of Lockheed ”
Figure 6: This suggested schematic diagram for a dual-band matching network also comes with a table of suggested passive component values to provide a starting point for design, analysis, and evaluation. Image source: Ignion
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