This paper presents, new compact and multiband frequency reconfigurable
antenna for cognitive radio applications. A UWB sensing and reconfigurable
communicating antennas are contained at the same substrate, where the
UWB sensing antenna is an elliptical printed monopole antenna operates on
frequency band from (2.65-22.112) GHz which can cover the UWB
frequency band from 3.1 to 10.6 GHz, while the communicating antenna is
an inverted-L frequency reconfigurable antenna operates on three bands of
1.49 GHz, 5.58 GHz, and 5.6 GHz under (S11 ≤ -10 dB) with a fractional
bandwidth of 5.872%, 6.02%, and 6.05% respectively. The proposed antenna
used to operate in two modes one for cognitive radio applications to cover
WLAN applications at 5.5 GHz and 5.6 GHz and the second mode for
wireless Ethernet, GPS synchronization, and Internet of Things that Matter
(IoTtM) at 1.49 GHz. The frequency reconfigurability is obtained by using
only a single RF switch (PIN diode) for changing the operating frequency.
The antenna overall dimensions are 72 x 36 x 1.6 mm3 printed on an FR-4
epoxy substrate of 4.3 relative-permittivity, loss tangent tan (δ) = 0.002 and
50 Ω micro stripline feed. The obtained simulated gain is ranging from 1.35
to 4.132 dBi. The S11 and isolation (S12) between the two antennas are
under -20 dB and -17 dB respectively at the resonant frequencies.
Publication Date
7/1/2020
Publisher
Indonesian Journal of Electrical Engineering and Computer Science
Volume No
19
Issue No
1
ISSN/ISBN
2502-4752
DOI
10.11591/ijeecs.v19.i1.pp267-275
Pages
265-275
Keywords
Cognitive radio CST PIN diode Reconfigurable antenna UWB VSWR
عبدالله علي جابر الحسيني | Abdullah Ali Jabber Alhusseini | 1912