High gain antenna at 915 MHz for off grid wireless networks

Hussam Hamid Keriee,Fahad Taha Al-Dhief,Mohamad Kamal A Rahim,Ahmed Jamal Abdullah Al- Gburi,Mustafa M Jawad,Nawres Abbas Nayyef,Zahriladha Zakaria

doi:10.11591/eei.v9i6.2192

Abstract

This paper presents a high gain antenna for off-grid wireless networks at 915 MHz. The requirements for compact size and high gain antenna are needed in the industrial, scientific and medical (ISM) band for better performance and coverage. Hence, microstrip planar substrate is proposed to overcome the size challenges. The proposed antenna is designed based on rectangular patch with air gap technique. The proposed antenna is optimized using computer simulation technology software (CST) and fabricated on low profile FR-4 substrate. The measured performance agreed well with the simulated one. The reflection of less than -10 dB is obtained with high gain of 6.928 dB at desired frequency. Overall, this antenna can be a good candidate for the off-grid wireless network applications.

Highlights

The increasing needs for high gain antenna and compact size for industrial, scientific and medical (ISM) communication system are outlined as a requirement for better wireless network performance [1]
Microstrip technology is preferred in the lower frequency due to the ability of having small size and can produce massive array
This paper demonstrates a rectangular patch antenna with air gap technique based on microstrip technology at 915 MHz

Summary

INTRODUCTION

The increasing needs for high gain antenna and compact size for industrial, scientific and medical (ISM) communication system are outlined as a requirement for better wireless network performance [1]. Various technologies for designing the antenna with compact size and high gain are introduced [2,3,4] They are microstrip, waveguide, and substrate integrated waveguide (SIW). There is a challenge to design a high gain antenna using microstrip technology at ISM band that has low profile, low loss, and compact size. The bandwidth is very narrow compared to the works presented in [9,10,11] All these designs are proposed for on-grid communication. This paper demonstrates a rectangular patch antenna with air gap technique based on microstrip technology at 915 MHz. The paper is divided as follow: section 2 presents the antenna design procedure.

DESIGN PRINCIPLE

RESULTS AND DISCUSSION

CONCLUSION