Gap waveguides

GAP waveguides is a novel packaging technology for millimeter wave and terahertz circuits and components that has unique advantages compared to existing transmission line and waveguide technology.

The technology enables planar solutions with extremely low losses, operating typically from 30 GHz to THz in applications such as antenna systems for Gigabit speed wireless communication and backhaul.

The technology is based on an Artificial Magnetic Conductor that enables contactless propagation of electromagnetic waves, significantly reducing transmission losses.

Antennas based on the GAP technology have over 10 times lower losses than micro strip lines, over 3 times lower losses than SIW, and approximately the same losses as rectangular waveguides.

The GAP waveguide technology has unique possibilities of creating tightly integrated solutions, including planar antennas, filters, diplexers, and other active components. GAP antennas with multiple ports are suitable for beamforming applications.

The superior performances of the GAP waveguide technology, both as a transmission line for making advanced microwave circuits and as a packaging technology, have been verified and described in several scientific journal articles, letters, and conference papers.

Transmission losses
comparison between alternatives

Scientific papers

The scientific bases of the GAP waveguide technology is described in the following
papers and publications.

Local metamaterial-based waveguides in gaps between parallel metal plates
P.-S. Kildal, E. Alfonso, A. Valero-Nogueira, E.Rajo-Iglesias
IEE Antennas and Wireless Propagation letters (AWPL) Volume 8, pp. 84-87, 2009.
Berlin, 23-27 March 2009
Three Metamaterial-based Gap Waveguides between Parallel Metal Plates for mm/submm Waves
P.-S. Kildal
3rd European Conference on Antennas and Propagation (EuCAP 2009), Berlin, 23-27 March 2009.
Parallel plate cavity mode suppression in microstrip circuit packages using a lid of nails
E. Rajo-Iglesias, A. Uz Zaman, P.-S. Kildal
IEEE Microwave and Wireless Components Letters, Vol. 20, No. 1, pp. 31-33, Dec. 2009.
August 2010
Closed form expressions for the modal dispersion equations and for the characteristic impedance of a metalmaterial based gap waveguide
A. Polemi, S. Maci
Special Issue on Microwave Metamaterials: Application to Devices, Circuits and Antennas in IET Microw Antennas Propagation, Vol. 4, Iss. 8, pp. 1073-1080, August 2010.
Nov. 2010
Construction of Green´s functions of parallel plates with periodic texture with application to gap waveguides – A plane wave spectral domain approach
M. Bosiljevac, Z. Sipus, P-S Kildal
IET Microwave Antennas Propagation, Vol.4, Iss. 11, pp. 1799-1810, Nov. 2010.
Spring 2011
Numerical studies of bandwidth of parallel plate cut-off realized by bed of nails, corrugations and mushroom-type EBG for use in gap waveguides
E. Rajo- Iglesias, Per-Simon Kildal
to appear in IET Microwave Antennas Propagation, Spring 2011.
Spring 2011
Dispersion characteristics of metamaterial-based parallel-plate ridge gap waveguide realized by bed of nails
A. Polemi, S. Maci, P-S Kildal
to appear in IEEE Transactions on Antennas and Propagation, Spring 2011.
Spring 2011
Design and experimental verification of ridge gap waveguides in bed of nails for parallel plate mode suppression
P.-S. Kildal, A. Uz Zaman, E. Rajo-Iglesias, E. Alfonso, A. Valero-Nogueira
to appear in IET Microwave Antennas Propagation, Spring 2011.
Wide-Band Slot Antenna Arrays With Single-Layer Corporate-Feed Network in Ridge Gap Waveguide Technology,
U. Zaman and P. S. Kildal
Antennas and Propagation, IEEE Transactions on, vol. 62, pp. 2992-3001, 2014.
Sep. 2014
2x2-slot Element for 60GHz Planar Array Antenna Realized on Two Doubled-sided PCBs Using SIW Cavity and EBG-type Soft Surface fed by Microstrip-Ridge Gap Waveguide,
Razavi, P.-S. Kildal, X. Liangliang, E. Alfonso, and H. Chen
IEEE Trans. Antennas Propag. , vol. 62, no. 9, pp. 4564-4573, Sep. 2014.
Gap Waveguide PMC Packaging for Improved Isolation of Circuit Components in High-Frequency Microwave Modules
A. U. Zaman, M. Alexanderson, T. Vukusic, and P. S. Kildal
Components, Packaging and Manufacturing Technology, IEEE Transactions on, vol. 4, pp. 16-25, 2014.
Corporate-Fed Planar 60 GHz Slot Array Made of Three Unconnected Metal Layers Using AMC pin surface for the Gap Waveguide
Vosoogh and P.-S. Kildal
IEEE Antennas and Wireless Propagation letters accepted in September. 2015


Presentation at Aktiedagen Stockholm the 6th of March 2017

Mar 2017

Lars-Inge Sjöqvist presents Gapwaves AB at Aktiedagen in Stockholm 6th March 2017.

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Gapwaves is hiring

Oct 2016

Gapwaves is recruiting experienced professionals and top talents to join the team. For more information about the available positions, visit…

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Gapwaves is issuing new shares

Sep 2016

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