What are chip and ceramic antennas?

Chip antennas are surface-mount components in which a radiating conductor is printed on or embedded in high-permittivity ceramic, shrinking the resonant length by roughly 1/√ε_eff. Their performance depends heavily on the host board: the ground plane is a major part of the radiator, so ground size, clearance area and matching network specified in the manufacturer’s layout guide largely determine efficiency.^[1][2]

How do chip antennas work?

Most are compact monopole, IFA or loop structures loaded with ceramic. High permittivity stores energy in the dielectric, lowering resonance but raising Q, narrowing bandwidth and increasing sensitivity to tolerances, consistent with the Chu limit.^[2]

How should a chip antenna be laid out?

• Place it at a board edge or corner with the specified copper-free clearance on all layers.
• Use the evaluation-board ground length when possible; resonance shifts with ground size.
• Include a pi-matching network footprint at the feed to retune for the final enclosure.
• Keep batteries, displays, shields and screws out of the clearance.^[1]

When choose a chip antenna over a PCB trace antenna?

Chip antennas save area, especially at sub-GHz where printed IFAs become large, and are less sensitive to PCB material variation. A printed IFA costs nothing and often achieves equal or better efficiency at 2.4 GHz if space allows.^[1][3]

Frequently asked questions

See also

• PCB antennas
• Ground-plane effects
• Detuning by enclosures
• Placement and keep-out

References

Online sources accessed October 21, 2026; printed works cited by edition. See all sources.

1. “Antenna Selection Guide (SWRA161)”. R. Wallace, Texas Instruments. application note.
2. “Modern Small Antennas”. K. Fujimoto and H. Morishita, Cambridge University Press. 2013.
3. “AN043: Small Size 2.4 GHz PCB Antenna (SWRA117)”. A. Andersen, Texas Instruments. application note.