International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
A COMPACT MICROSTRIP NARROW BAND ANTENNA FOR UPPER IoT APPLICATION M.JAYAMOHAN1, V.JANAKIRAMAN2, S.MURALI KRISHNAN3, S.VIGNESH4 Assistant Professor, Dept of ECE, Apollo Engineering College, Tamilnadu, Chennai Professor, Head of ECE, Apollo Engineering College, Tamilnadu, Chennai Student, Dept of ECE, Apollo Engineering College, Tamilnadu, Chennai Student, Dept of ECE, Apollo Engineering College, Tamilnadu, Chennai ----------------------------------------------------------------------------------------------------------------------------------Abstract - A compact micro strip narrow band
The filter and the antenna were together so that
antenna to be designed for the wireless communication.
they shared the same ground plane. By minimizing the
The designed antenna operating frequency range is 5.6
impedance at the interfaces of the filter and the antenna,
to 5.9 GHz. The design can be used as filter and an
the impedance bandwidth was improved. In these
antenna (Cumulative design). A compact two pole
designs, the last resonator and the load impedance of
filtering antenna is designed. The designed antenna
bandpass filter were substituted by the Г–shaped
achieves a 50Ω impedance matching. Compared to the
antenna and the rectangle patch antenna, whose
traditional antenna, the filtering antenna obtains the
dimensions are in the order of a half-wavelength. a
flatter gain response within the passband, good
compact two-pole filtering antenna is presented. First, a
selectivity at the passband edge, and the wider
two-pole Butterworth band pass filter is designed. Then,
bandwidth. Both the simulated result and measured
the second port and the second resonator of the filter are
result can operate at 5.6 to 5.9GHz.
replaced by a fan-shaped patch antenna with DGS, and a
Key Words: Filtering antenna, Passband, Flatter Gain
filtering antenna is formed. The fan-shaped patch antenna with DGS acts as a radiator as well as the second
1. INTRODUCTION By
the
resonator of the filter.By adopting the defected ground
rapid
development
in
wireless
structure, the size of the filtering antenna is minimized.
communication technology, focusing issue is to integrate
Moreover, the filtering antenna obtains the flatter gain
multiple function circuits in one device. The antenna and
response with in the passband, with good selectivity at
filter are two independent components in most of the RF
the passband edge. The measured result shows good
front end. The antenna is used to receive and transmit
agreement with the simulated one.
signal, and the filter is cascade right after the antenna for
2. DESIGN OF FILTER AND ANTENNA
filtering the spurious signals. These two components are 50Ω
The fan-shaped patch antenna can be modeled
transmission line. This transmission line not only
by parallel inductance, capacitance, and resistance, and
degrades the performance of the system, but also
the DGS creates the additional effective inductance and
occupies the additional circuit area. For minimizing the
capacitance. Thus, the proposed fan-shaped patch
circuit size, a predesigned bandpass filter was embedded
antenna with DGS is modeled by parallel LA CA RA
designed
separately
and
connected
by
a
in the feedline of a patch antenna.
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