Co-Design of a GPS Antenna Low-Noise Amplifier Front-End Circuit

E. S. Sakomura, D. F. M. Boada, D. C. Nascimento


This paper presents a clear and fast design procedure for directly matched low noise active integrated microstrip antenna front end circuits. Initially, a theoretical analysis is given for the overall gain equivalence between traditional and directly matched antennas. Then, a detailed procedure is presented for the design and construction of a fully integrated GPS antenna. To validate the proposed procedure, a prototype was built and characterized by measuring the reflection coefficient, radiation pattern, noise figure and the active antenna overall gain. Additionally, a field test comparison was made between the manufactured prototype and a commercially available active antenna using the u-blox NEO-6M GPS receiver module. The prototype experimental and field test results showed excellent performance, thus validating the proposed co-design approach.


Active integrated antenna, co-design, direct matching, front-end circuit, low noise amplifier, microstrip antenna

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M. Sharawi, F. Ghannouchi, S. Dhar and O. Hammi, "Miniaturised active integrated antennas: a co-design approach", IET Microwaves, Antennas & Propagation, vol. 10, no. 8, pp. 871-879, 2016.

Xianming Qing, Chean Khan Goh and Zhi Ning Chen, "Impedance Characterization of RFID Tag Antennas and Application in Tag Co-Design", IEEE Transactions on Microwave Theory and Techniques, vol. 57, no. 5, pp. 1268-1274, 2009.

A. Dierck, F. Declercq and H. Rogier, "Review of active textile antenna co-design and optimization strategies", 2011 IEEE International Conference on RFID-Technologies and Applications, 2011.

S. Gao, Y. Qin and A. Sambell, "Circularly polarized broadband high-efficiency active integrated antenna", Microwave and Optical Technology Letters, vol. 48, no. 11, pp. 2145-2148, 2006.

K. Eccleston, "Four FET active integrated microstrip antenna", Microwave and Optical Technology Letters, vol. 51, no. 12, pp. 2997-3000, 2009.

R. Raj, S. Kundukulam, C. Aanandan, K. Vasudevan, P. Mohanan and P. Kumar, "Compact amplifier integrated microstrip antenna", Microwave and Optical Technology Letters, vol. 40, no. 4, pp. 296-298, 2004.

A. Kaya and S. Çömlekçi, "The design and performance analysis of integrated amplifier patch antenna", Microwave and Optical Technology Letters, vol. 50, no. 10, pp. 2732-2736, 2008.

Hyungrak Kim, Ick-Jae Yoon and Young Joong Yoon, "A novel fully integrated transmitter front-end with high power-added efficiency", IEEE Transactions on Microwave Theory and Techniques, vol. 53, no. 10, pp. 3206-3214, 2005.

J. Lee, C. Wu and T. Itoh, "A power efficient active integrated antenna", Microwave and Optical Technology Letters, vol. 55, no. 6, pp. 1240-1243, 2013.

Avago Technology, “Broadcom Limited,” [Online]. Available:


D. Moná, E. Sakomura and D. Nascimento, "Circularly polarised rectangular microstrip antenna design with arbitrary input impedance", IET Microwaves, Antennas & Propagation, vol. 12, no. 9, pp. 1532-1540, 2018.

C. Balanis, Antenna theory. Hoboken: Wiley-Interscience, 2005.

G. González, Microwave transistor amplifiers. Upper Saddle River: Prentice Hall, 1997.

Avago Technology, “Broadcom Limited,” [Online]. Available:


Agilent Technologies, “Hewlet Packard Woodshot,” [Online]. Available:


F. Lumini, L. Cividanes and J. d. S. Lacava. “Computer aided design algorithm for singly fed circularly polarized rectangular microstrip patch antennas,” RF and Microwave Computer-Aided Engineering, vol.9, no. 1, pp. 32-41, 1999.

D. C. Nascimento and J. C. da S Lacava, “Design of Arrays of Linearly Polarized Patch Antennas on an FR4 Substrate: Design of a probe-fed electrically equivalent microstrip radiator,” IEEE Antennas and Propagation Magazine, vol. 57, no. 4, pp. 12-22, 2015.

H. An, B. Nauwelaers and A. Van de Capelle, “Noise figure measurement of receiving active microstrip antennas,” IEEE Electronic Letters, vol. 29, no. 18, pp. 1594-1596, 1993.

M. Sharawi and D. Aloi, "WLC26-6: C/No Estimation in a GPS Software Receiver in the Presence of RF Interference Mitigation via Null Steering for the Multipath Limiting Antenna", IEEE Globecom 2006, 2006.



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