Microstrip Line Geometric Variation Consequences for Linear Parameters of Microwave Amplifiers

  • Mahavirsingh Rajpurohit
  • Kishor G. Sawarkar
  • K. B. Pramod
  • Kushal Tuckley
  • Kumarswamy
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 472)


This article analyzes and traces the design arrangement of the broadband low noise amplifier (LNA) with geometrical varieties in microstrip line structure divulge circa over the linear parameters like gain, noise figure (NF), return loss (RL), and stability of LNA. Firstly, design of LNA utilizing linear microstrip lines after that LNA design with mitering of microstrip lines with same input and output matching networks had been done and give essential comparisons of parameters. All design configuration, measurements, and estimations are conveyed, carried in applied wave research (AWR) microwave office tool. Likewise, the simulations result shows that with mitered (U-bend) microstrip line in band 7.5–10 GHz parameters, input return loss (IRL) is enhanced by critical amount and NF, gain, output return loss (ORL) are improved by minor fraction but stability degrades by small fraction correspondingly. The proposed LNA with mitered microstrip lines will be favorable for the designer and engineers to analyze dissect effect and as investigate the impact from claiming geometric variation about microstrip lines. Purpose of this study is to analyze effect of geometric variation on broadband low noise amplifier instead of components values variation.


Microwave LNA Microstrip line Linear measurements and hybrid microwave integrated circuits 


  1. 1.
    You L, Wang C, Liu F (2010) A 3–5 GHz ultra-wideband low noise amplifier employing noise cancellation. In: 2010 IEEE international conference on ultra-wideband (ICUWB), vol 1. IEEE, pp 1–4Google Scholar
  2. 2.
    Yelten MB, Gard KG (2009) A novel design procedure for tunable low noise amplifiers. In: 2009 IEEE 10th annual wireless and microwave technology conference WAMICON’09, Clearwater, FL, pp 1–5.
  3. 3.
    Jha CK, Gupta N (2012) Design of a front end low noise amplifier for wireless devices. In: 2012 students conference on engineering and systems (SCES), Allahabad, Uttar Pradesh, pp 1–4.
  4. 4.
    Pramod KB, Kumaraswamy HV (2016) The design, optimization and characterization of 7 GHz ultra low noise figure amplifier using hybrid MIC technique for satellite mobile applications. Commun Appl Electron (CAE) 6(4)Google Scholar
  5. 5.
    Mishra UK, Parikh P, Wu Y-F (2002) AlGaN/GaN HEMTS-an overview of device operation and application. Proc IEEE 90:1022–1031CrossRefGoogle Scholar
  6. 6.
    Arsalan M, Amir F, Khan T (2014) pHEMT LNA design and characterization for 4G applications. In: 2014 IEEE 17th international multi-topic conference (INMIC), Karachi, pp 61–66Google Scholar
  7. 7.
    Lim JS, Park JS, Lee YT, Ahn D, Nam S 2002) Application of defected ground structure in reducing the size of amplifiers. IEEE Microwave Wirel Compon Lett 12(7):261–263CrossRefGoogle Scholar
  8. 8.
    Lim JS, Lee YT, Kim CS, Ahn D, Nam S (2002) A vertically periodic defected ground structure and its application in reducing the size of microwave circuits. IEEE Microwave Wirel Compon Lett 12(12):479–481CrossRefGoogle Scholar
  9. 9.
    Hasaneen ESAM, Okely N (2012) On-chip inductor technique for improving LNA performance operating at 15 GHz. Sci Res Circuits Syst 3:334–341CrossRefGoogle Scholar
  10. 10.
    Sawarkar KG, Pramod KB, Tuckley K, Kumaraswamy HV (2015) The frequency, time design analysis of noise figure optimization of a wideband PHEMT hybrid LNA with flat gain for WiMAX application. In: International conference on communication technology (ICCT 2015)Google Scholar
  11. 11.
    Pozar DM (2012). Microwave engineering, 4th ednGoogle Scholar
  12. 12.
    Visser HJ (2007) Equivalent length design equations for right-angled microstrip bends. In: The second European conference on antennas and propagation, EuCAP 2007, Edinburgh, pp 1–6Google Scholar
  13. 13.
  14. 14.
    Kirschning M, Jansen RH, Koster NHL (1983) Measurement and computer-aided modeling of microstrip discontinuities by an improved resonator method. IEEE MTT-S international microwave symposium digest, pp 495–497Google Scholar
  15. 15.
    Margomenos A, Rida A (2009) System and method for improving performance of coplanar waveguide bends at mm-wave frequencies. US patent, US20100182107 A1Google Scholar
  16. 16.
    Avago Technology. ATF-36163 datasheetGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Mahavirsingh Rajpurohit
    • 1
  • Kishor G. Sawarkar
    • 1
  • K. B. Pramod
    • 1
    • 2
  • Kushal Tuckley
    • 3
  • Kumarswamy
    • 4
  1. 1.MCT’s RGITMumbaiIndia
  2. 2.JAIN UniversityBangaloreIndia
  3. 3.R&D, AGV SystemMumbaiIndia
  4. 4.RVCEBangaloreIndia

Personalised recommendations