Document Type : Original Research Paper


Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, 5166616471 Iran


This paper presents an element of a 2×2-element array antenna for Inmarsat BGAN/GPS applications. The element is an axial mode printed quadrifilar helical antenna that has been integrated with a compact feed network to provide sequential phase rotation for circular polarization (CP) radiation. The novel integrated lumped-element feed network is designed to provide a balanced RF power to the four helix arms with a 90° sequential phase difference between them. The design maintains a low cross polarization, and accordingly, a high quality of RHCP up to ±66° over the transmit frequency band of 1616 MHz to 1626 MHz. The gain in this frequency range is higher than 3.5 dB with a return loss better than 11 dB and a perfect circular polarization performance (axial ratio ~0 dB).
The proposed antenna has small size, light weight, low cost, almost hemispherical radiation pattern and excellent circular polarization that can become a good candidate in satellite L1-band and BGAN satellite communications.

Graphical Abstract

A Small Printed Quadrifilar Helical Antenna for BGAN/GPS Applications


[1] D.C. Morse and K. Griep, “Next generation FANS over Inmarsat Broadband Global Area Network (BGAN),” in Proc. 23rd DASC Conf., pp.11.B.4-1-13, 2004.
[2] M. Shaw, D.A. Turner, and K. Sandhoo, “Modernization of the global positioning system,” in Proc. Japanese Inst. of Navigation, GPS Symp., pp. 3–12, 2002.
[3] S. O'Kane and V. Fusco, “Circularly polarized curl antenna lens with tilt properties,” IEEE Trans. Ant. and Propag., vol. 57, no. 12, pp. 3043-3050, 2009.
[4] M. Amin, S. Ahmed, V. Fusco, H. Cantu, and T. Ratnarajah, “The effect of spatial axial ratio variation on QPSK modulation encoded using orthogonal circularly polarized signals,” in Proc. European Conf. on Wireless Technologies, pp. 62–65, 2007.
[5] W. Richards and Y. Lo, “Design and theory of circularly polarized microstrip antennas,” in Proc. Int. Symp. on Ant. and Propag. Soc., vo. 17, pp. 117 – 120, 1979.
[6] K.L. Chung and A.S. Mohan, “A systematic design method to obtain broadband characteristics for singly-fed electromagnetically coupled patch antennas for circular polarisation,” IEEE Trans. Ant. and Propag., vol. 51, pp. 3239– 3248, 2003.
[7] P. Xu, Z. Yan, X. Yang, T. Zhang, and G. Yuan,”Miniature folded printed quadrifilar helical antenna with integrated compact feeding network,” PIER lett., vol. 45, pp. 13-18, 2014.
[8] A. Takacs, H. Aubert, D. Belot, and H. Diez, “Miniaturization of compact quadrifilar helix antennas for telemetry, tracking and command applications,” PIERC, vol. 60, pp. 125-136, 2016.
[9] B. Slade, “The basics of quadrifilar helix antennas,” Orban Microwave Inc., 2015.
[10] S.G. Kim and K. Chang, “Ultrawide-band transitions and new microwave components using double-sided parallel-strip lines,” IEEE Trans. Microw. Theory Tech., vol. 52, no. 9, pp. 2148-2151, 2004.


Journal of Electrical and Computer Engineering Innovations (JECEI) welcomes letters to the editor for the post-publication discussions and corrections which allows debate post publication on its site, through the Letters to Editor. Letters pertaining to manuscript published in JECEI should be sent to the editorial office of JECEI within three months of either online publication or before printed publication, except for critiques of original research. Following points are to be considering before sending the letters (comments) to the editor.

[1] Letters that include statements of statistics, facts, research, or theories should include appropriate references, although more than three are discouraged.

[2] Letters that are personal attacks on an author rather than thoughtful criticism of the author’s ideas will not be considered for publication.

[3] Letters can be no more than 300 words in length.

[4] Letter writers should include a statement at the beginning of the letter stating that it is being submitted either for publication or not.

[5] Anonymous letters will not be considered.

[6] Letter writers must include their city and state of residence or work.

[7] Letters will be edited for clarity and length.