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IoT Multiband Antenna Solution

IoT Multiband Antenna Solution PDF Datasheet 0830AT54A2200

7-band, Single Antenna Solution for Cellular LTE NB IoT/CAT M1, Sub GHz, GPS/GNSS, & 2.4GHz

As the demand for a compact, all-encompassing solution for IoT connectivity continues to grow, we've developed a multi-band flexible solution using one antenna (p/n 0830AT54A2200). This antenna can resonate at multiple frequencies. For it to achieve high efficiency and bandwidth, it requires antenna matching networks to cover Cellular/SubGHz/GPS-GNSS/2.4GHz bands.

All characterizations and gains we measured on a small, 51x51mm PCB (including the antenna clearance).

Below is a representation of the total antenna effective area and 2 switches required for this solution:

IoT multiband antenna solution supporting reliable wireless connectivity across multiple communication standards and frequency bands.

Introduction

In an effort to create a small-footprint antenna solution for cellular LTE, NB-IoT, geo location GPS/GNSS, and 2.4GHz frequency spectrums, Johanson has created a single antenna matching solution to cover all relative frequency bands. In addition to simplifying device bill-of-materials, costs can be reduced by re-using the same flexible solution in various applications.

By combining Johanson's 0830AT54A2200001E antenna with 2 channel switches, the designer has the ability to cycle through all usable channels mentioned above. Based on the number of channels required, we recommend the use of 2 (two), SP6T switches to cover the entire cellular spectrum as well as GPS/GLONASS and 2.4GHz Bluetooth or WiFi.

In our example, the Qorvo RFSW6062 switch is used. The Hexawave HWS556 is a substitute performance-wise, but it is not interchangeable.

Resource Links:

Antenna Datasheet 0830AT54A2200001E

Qorvo RFSW6062 Switch
Hexawave HWS556 Switch

PCB size and Recommended Antenna Keep-out Area

PCB layout diagram for an 0830AT54A2200 antenna showing board dimensions, trace routing, and recommended placement area.

Detailed antenna footprint layout for the 0830AT54A2200 chip antenna with dimensions, ground clearance, and bandwidth optimization guidelines.

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Matching Network Topologies with Switches

RF matching network topology with switch-controlled tuning components connecting an RF chipset to an 0830AT54A2200 chip antenna.

Qorvo RFSW6062 Switch

Frequency Channels and Matching Values

Channel Frequency (MHz) L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 C1
1 700 - 750 11nH 30nH
2 750 - 800 10nH 27nH
3 791 - 894 8.2nH 22nH
4 880 - 960 6.9nH 18nH
5 1574 - 1577* 3.0nH 0.9pF
6 1710 - 2200 2400 - 2480 24nH

Channel 5 may be tuned for GLONASS operation (1598-1609MHz)

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Measured Return Loss By Channel

Measured return loss by channel for a tunable antenna, showing performance across the 700 MHz to 750 MHz frequency range.

Measured return loss by channel for a tunable antenna operating across the 750 MHz to 800 MHz frequency range.

Measured return loss by channel for a tunable antenna operating across the 791 MHz to 894 MHz frequency range.

Measured return loss by channel for a tunable antenna operating across the 880 MHz to 960 MHz frequency range.

measured-return-loss-by-channel-1.574ghz-1.577ghz

Measured return loss by channel for a tunable antenna operating across the 1.710 GHz to 2.200 GHz frequency range, covering cellular and wireless communication bands.

0830AT54A2200 Radiated Efficiency on 51x51mm board

Radiated efficiency data for the 0830AT54A2200 tunable antenna on a 51 mm × 51 mm PCB, showing efficiency and switch insertion loss across multiple frequency bands and channel settings.

Performance based on example PCB with dimensions 51mm x 51mm