Pifa Antenna Research Papers - Academia.edu (original) (raw)

This paper introduces a broadband planar inverted-F antenna (PIFA) with U–Shaped capacitive feed technique for higher LTE band
applications. The proposed antenna is based on a simple PIFA, where the capacitive feed plate, radiating plate and ground plate is
modified into a U–Shaped such that the antenna can have wideband characteristics. With the use of the proposed feeding configuration,
the antenna shows a very wide pattern and impedance bandwidth of about 81.6% for VSWR ≤ 2.0 from 1.66 GHz to 3.95 GHz which can
cover the higher band of LTE (1.71GHz-3.8GHz), DCS 1800, DCS 1900, UCDMA, UMTS, IMT 2000, DMB, Wi-Fi, 2.4GHz, WiMAX
(2.3–2.5 GHz), WiMAX (3.4–3.5 GHz) and Bluetooth applications.

- by DYNA Revista and +2
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- Pifa Antenna, Wideband Antenna, Capacitive Feed Technique, LTE antenna design

Recently, the demand for wireless devices that support multi-band frequency has increased. In fact, employing single-band antennas leads to large space requirement in handheld devices. Therefore, due to the space constraints in mobile devices, an antenna which will cover multiple bands of frequencies will be the best solution in order to allow more space in the mobile devices. The integration of such technology in mobile communication system has led to a great demand in developing small size antenna with multi-band operation that is able to operate in the required system. In this paper, a triple band planar inverted-F antenna (PIFA) is proposed. The antenna has been measured and found to operate at three operating frequencies of GSM bands (900 MHz and 1800 MHz), and Bluetooth band (2400 MHz). A dual L-shaped slot was used on the patch to obtain the triple-band resonant frequencies. Performance of the antenna has examined and results have shown that the proposed antenna can successfully cover frequencies 900 MHz, 1800 MHz and 2400 MHz.

The paper proposes a dual band Planar Inverted F Antenna (PIFA) that consists of Metamaterial superstate. The superstate is made up of modified square split-ring resonator (SSRR) with rings on both sides of the dielectric substrate. In order to obtain wide bandwidth with dual-band operation, a Metamaterial unit cell based superstate is introduced above the main radiating patch. The dual band antenna have two resonant frequencies i.e., 2.6 GHz for Long Term Evolution (LTE) and 3.5 GHz for WiMAX applications. The antenna is designed on Rogers Duroid 5880 dielectric substrate. The total area of the antenna is 42mm × 20mm while the height of the antenna is 3.8 mm. It can be observed that the PIFA with Superstate covers a wider bandwidth and provides significant gain enhancement as compared to conventional PIFA design without superstate.

This work presents a small size planner inverted-F antenna (PIFA), with a single feed which covers WiMAX (3.2-3.6 GHz) and (5-5.8 GHz) range. The proposed antenna has many advantages like compact size and wide operation bandwidth. The... more

- by IJEEE APM
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- Antennas, Antennas & Radio Wave Propagation, IEEE 802.16 (WiMAX), HFSS

Planar inverted-F antennas are miniature designs that
offer considerable versatility for both mobile and other wireless
applications. The design is particularly suited for mobile devices.
In this paper the design and of a compact quad band planar
inverted-F antenna (PIFA) is proposed for mobile handset
applications. The proposed antenna is a PIFA with slots inserted
in top radiating patch as well as ground plane to get multi-band
operation. The antenna covers GSM900, GPS, GSM1900 and
UMTS bands. The antenna consists of a rectangular planar
element suspended above the FR4 dielectric substrate. The
ground plane is on the bottom side of the substrate. The antenna
is having a simple structure, small size, wide bandwidth and
good gain. The antenna geometry, simulations of return loss,
hardware implementation and measured results are also
discussed

Planar Inverted-F Antenna (PIFA) is the most commonly used antennas for mobile phone applications because of their compact size and SAR properties. The bandwidth of an antenna is the set of frequencies over which the antenna reliably transmits or receives the electromagnetic waves. The reliable operation of an antenna requires low return loss which occurs due to reflections. The return losses are determined by the input impedance of the antenna. Hence it is important to choose the optimal feeding point having an impedance close to 50 ohm (characteristic impedance of feed) to reduce the reflections and hence the return loss. In this paper, a brief procedure is given on how to obtain the optimal feeding point for an antenna using the current and voltage distribution over the radiating surface. Also an approximate expression has been derived to obtain the optimal feeding point. It is possible to reduce the return loss to less than-20dB by this method.

- by IJRASET Publication
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- Pifa Antenna, Feeding Point Reflection Co-Efficient

Wireless and mobile networks are being used in diverse areas such as travel, education, stock trading, military, package delivery, disaster recovery, and medical emergency care. In this paper the proposed Compact F-Shaped Mobile Antenna works for Multiple Wireless Applications which operates at 1.575 GHz (Global Positioning System), 2.1 GHz (3G), 2.3 GHz (Universal Mobile Telecommunications System) and 2.9 GHz (Digital Multimedia Broadcasting). The antenna consists of a F-shape defected microstrip patch and line resonators embedded to semi-infinite Ground plane for achieving multi band resonance. The F-shape patch and defected microstrip patch is incorporated for generating four resonating frequencies. Ground plane is optimized to achieve proper Quad band operation of the antenna. The model of the antenna is built and simulated using ADS software. The designed antenna having the good return loss of >-13 dB for all frequencies and the size of 39 mm x 26 mm is achieved.

The aim of our study was to identify threshold levels of DNA methylation predictive of the outcome to better define the risk group of stage 4 neuroblastic tumor patients. Quantitative pyrosequencing analysis was applied to a training set of 50 stage 4, high risk patients and to a validation cohort of 72 consecutive patients. Stage 4 patients at lower risk and ganglioneuroma patients were included as control groups. Predictive thresholds of methylation were identified by ROC curve analysis. The prognostic end points of the study were the overall and progression-free survival at 60 months. Data were analyzed with the Cox proportional hazard model. In a multivariate model the methylation threshold identified for the SFN gene (14.3.3σ) distinguished the patients presenting favorable outcome from those with progressing disease, independently from all known predictors (Training set: Overall Survival HR 8.53, p = 0.001; Validation set: HR 4.07, p = 0.008). The level of methylation in the tumors of high-risk patients surviving more than 60 months was comparable to that of tumors derived from lower risk patients and to that of benign ganglioneuroma. Methylation above the threshold level was associated with reduced SFN expression in comparison with samples below the threshold. Quantitative methylation is a promising tool to predict survival in neuroblastic tumor patients. Our results lead to the hypothesis that a subset of patients considered at high risk—but displaying low levels of methylation—could be assigned at a lower risk group.

- by Vincy Di Giorgio
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- Pifa Antenna
- by Andrey S Andrenko
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- Antennas, Pifa Antenna, Dual-Band Antennas, Planar Inverted F Antenna

This paper presents the design of a reconfigurable planar inverted-F antenna (PIFA). The proposed antenna is designed and optimized to operate in two frequency bands. 2.4 GHz allocated to the industrial, scientific and medical (ISM) band for the identification of a set of vehicules within a given area, and 1.575 GHz allocated to the global positioning system (GPS) band to locate them outside. The ISM band is used for microwave frequencies for active radio frequency identification (RFID) tag, which is associated with the object to be identified. This antenna consists of two radiating elements connected by a positive-intrinsic-negative (PIN) diode to obtain the frequency reconfigurability. The first radiating element is connected to the ground plane by a shorting pin and excited by a 50 Ω coaxial feed line. Its total size is 30 mm × 50 mm × 7 mm. The substrate used is FR4 with constant dielectric relativity of 4.4 and a height of 1.6 mm. Computer simulation technology microwave studio (CST MWS) software is used to simulate and optimize the proposed reconfigurable PIFA antenna.

- by TELKOMNIKA JOURNAL
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- GPS Applications, Reconfigurable Antennas, Pifa Antenna

A planar inverted-F antenna with a huge
bandwidth starting from 817MHz to 11.5 GHz proposed as
an substitute for high concert mobile phones proposed to
cover the major part of the mobile phone frequencies global
as well as the multi wideband frequency range. A prototype
of the antenna was construct and the reflection coefficient
and radiation patterns were measured to display an adequate
radiation performance. Besides, the easy creation without a
matching network or a difficult geometry is an
supplementary attribute that can be reflected in low
invention cost

- by Barbara Banelli
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- Cancer, Risk, Risk assessment, Humans
- by Barbara Banelli
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- Cancer, Risk, Risk assessment, Humans

In this paper a novel miniature Planar Inverted F Antenna (PIFA) for 5G wireless technology has been proposed. The overall size
of the proposed antenna including the ground plane is 18mm × 10mm × 3.5mm, which is suitable to be used in a mobile device as
well as in small wearable electronics. The antenna covers proposed 5G frequency band and covers a wide frequency range from
9.77GHz-11.58GHz. The top radiating patch of the antenna has two truncated edges, hence making it a novel design. In this paper
various performance parameters such as return loss, VSWR, gain and radiation pattern are also discussed. Measured results are in
good agreement with simulated results.

- by Stefano Bonassi
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- Cancer, Risk, Risk assessment, Humans