Here’s How To Make Small, Low-cost PCB Antenna!

With the introduction of many applications into the 2.4 GHz and 915 MHz bands for commercial and consumer use, the demand for compact PCB antennas operating in the ISM bands is ever-increasing. As the name suggests, PCB antennas are printed directly on the board.
Mentioned below are reference designs of high performance & compact PCB antennas which can help you expand your wireless network:-
  • ISM Band PCB Antenna with Excellent Efficiency: This reference design provides a medium size, low cost monopole PCB antenna solution with size 38 x 25 mm. The antenna is mainly intended for the ISM (Industrial, Scientific and Medical) bands of 868 MHz and 915 MHz. The antenna can be used in two different modes. If configured in Single Band Mode, this is ideal for 868 MHz, 915 MHz or 920 MHz operation. If configured in Dual Band Mode, it operates at 868 MHz and 2.4 GHz. The design is built around a sub- 1 GHz system-on-chip (SoC) CC1110Fx, CC1111Fx designed for very low power wireless applications. It combines a RF transceiver CC1101 and 8051 MCU with powerful features on a single chip, which can operate in very low-power modes. The harmonic levels are well within the regulatory standards. The design achieves excellent efficiency and a maximum gain of approximately 3 to 5 dBi. More on this Reference Design
  • Inverted-F PCB Antenna for 2.4 GHz Band: This document describes an Inverted-F PCB antenna designed for use in 2.4 GHz band and optimized for a 1″-wide PCB board. The designs can work with both the Ember EM250 and EM260 boards from Silicon Labs with different substrate thicknesses of 0.8mm and 62 mil. The antenna is designed for 50-ohm output. Many parameters affect antenna performance such as board size, plastic enclosures, metal shielding, and components in close proximity to the antenna. Thus, the antenna requires tuning with one series inductor and one shunt capacitor for best performance. The antennas designed for both boards have good bandwidth. More on this Reference Design
  • Cost-optimized Planar F-Antenna: This reference design implements a Planar F Antenna for cost-constrained applications. It can be used on a low-cost 1.6 mm FR-4 substrate. The design features an optional patch element used for capacitive proximity detection of an object like hand or finger in the antenna near-field. This maximizes maximum output power and protects antenna detuning. The design provides a 50-ohm output and 0 dBi omni-directional gain with no impedance matching components required.  The antenna is designed to work in 868 MHz and 915 MHz bands. More on this Reference Design
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