Dual‐band printed monopole slot antenna with combination of L‐slot and ARM‐slot for WLAN application

Abstract

In this letter, to the best of authors' knowledge, the first MMIC DPA realization in the X-band frequency range has been presented. A clever solution, that allows to reduce the size and to enlarge the bandwidth of the DPA, was adopted to realize the required uneven power splitter.Experimental results have shown a bandwidth larger than 20% around 9.5 GHz with a small signal gain of about 7 dB. Moreover, a 30-dBm saturated output power and a drain efficiency greater than 53% at 9.5 GHz have been measured. In the 6-dB power back-off (from 18 to 24 dBm input power), an AM/ AM distortion lower than 1 dB is also demonstrated with an average efficiency greater than 50%. ACKNOWLEDGMENTThe authors acknowledge SELEX-SI for its technology and modeling support. REFERENCES 1. W.H. Doherty, A new high efficiency power amplifier for modulated waves, ABSTRACT: Antenna communication technologies were developing fast in recent research area, and these technologies demand high performance antenna to coop with the development. Wireless local area network (WLAN) application is famous term in antenna field nowadays, where this application allowed the users to communicate in long range without wired connection. WLAN demands an antenna with small size and volume, low in cost and weight, easy to design, and can perform efficiently at two distinct frequencies. In this article, the dual-band antenna working at 2.45 and 5.8 GHz was proposed. The proposed antenna consists of L-slots and arm's slot, where these slots greatly influenced the dual-band ability. The combination of 45 of bending angle at all antenna edges and slots can enable the proposed antenna to have good performances in term of return losses, bandwidth percentages, and larger half-power bandwidth (HPBW) values at both frequencies. The proposed antenna works efficiently at 2.45-and 5.8-GHz frequency bands when this antenna gives return loss values of À25.1718 and À28.6754 dB, correspondingly. This device can generate a broad forward beam that covered À62.1 to 62.1 HPBW with 36% bandwidth at 2.45 GHz, whereas at 5.8-GHz band, the HPBW for this antenna covered from À77.4 to 52.2 with 7.04% bandwidth. The proposed antenna suits to be used in WLAN's applications such as in Wi-Fi, Bluetooth, and access point application. The proposed antenna measurement values meet the IEEE 802.11 standard to make this antenna reliable.ABSTRACT: A miniaturized bandpass filter (BPF) using dual-mode defected ground waveguide (DGW) resonator is developed in this letter. The technique with defected step-impedance shunt stub is applied to enhance the self-inductance and self-capacitance of the DGW loop resonator which leads to size reduction. Compared to the conventional design, the central frequency is reduced by 48%. A good agreement between simulation and measurement verifies the validity of this design methodology.

Miniaturized proximity coupled antenna with slot ring as defected ground structure

“…Some of these techniques include the use of meandering patch elements; loading of the shorting-pin between the patch and ground plane; use of dielectric resonator as radiating element; and the introduction of several slots on the patch element [5][6][7][8][9]. In [10], a slot angled at 45° with respect to the feed line has been added on the radiating element to enhance the impedance matching.…”

Circular Ring Open-Ended Monopole Antenna with Strip for WLAN Dual-Band Operations

“…With an increase in the popularity of WLAN communication, the demand for a printed monopole antenna designed with a low-profile, light-weight, flush-mounted, and simple structure has increased. Recently, multiband antennas for WLAN applications have been reported [1][2][3][4][5][6][7][8][9][10][11]. Among all these antennas, printed monopole antennas play an important role due to their attractive features of simple structure, low profile, and reasonably good performance.…”

A study on the rectangular ring, open‐ended monopole antenna with a vertical strip for WLAN dual‐band operations

“…Various kinds of multiband antennas have been tested for WLAN applications, such as monopole antennas [1, 2], printed dipole [3, 4], and coplanar waveguide (CPW)‐fed antennas [5]. Recently, multiband antennas for WLAN applications have been developed [6–16]. In particular, several papers related to rectangular, ring‐shaped monopole antennas were proposed [17–20].…”