Objective: To present a concise and comprehensive summarization of various impedance matching techniques for microstrip patch antennas. Method: Designing an network is central issue optimum performance in every part RF systems like transceiver, amplifier antenna to ensure maximum power transfer. Various design formulae calculate the input should be known designer. Finding: In this paper along with their equations are presented that utilize quarter wave transformer, taper lines, open or short...

The demand for data transmission is rising expensively the applications of biomedical sensors data, multimedia technologies, and ultrahigh-definition online video streaming. Such require larger bandwidth with minimum latency seamless service delivery. Radio-over-fiber (RoF), integrated wavelength division multiplexing (WDM) technology, being considered one promising technologies. However, integration optical fiber wireless communication also generates non-linear effects as when number users...

In this paper, a novel frequency reconfigurable U-slot microstrip antenna with T-shaped feed line for Software Defined Radio applications is proposed. The proposed antenna, indexed as A-I in operates at three different frequencies: 1.85GHz, 1.9GHz and 2.4GHz depending on the switching states of PIN diodes. Furthermore, to strengthen design concept strategy another improved (A-II) designed tested. comparison A-I, utilizes four slots/PIN diodes order increase number states. Depending switch...

A novel hybrid antenna capable of both spectrum sensing and frequency reconfigurability is proposed in this paper.The senses over a wide range from 1 GHz-12 GHz accordingly reconfigures its operating any the four different frequencies, i.e., 2.1 GHz, 2.96 3.5 5 GHz.Since wideband response for each state works independently, there no interference among various signals.The obtained by exciting semicircular arc having staircase-shaped slot ground plane.Frequency reconfiguration achieved...

A novel integrated antenna that consists of spectrum sensing and frequency reconfigurable antenna, printed on a single substrate is presented here.The integration both antennas based the fact reasonably large metallization area UWB can be used as space for printing another narrowband antenna.Prominently, second should placed region where there less distribution E field.The proposed senses over wide range from 2 GHz to 12 via U shape monopole having partial ground structure.After condition,...

This paper proposes a novel wideband to concurrent tri-band frequency reconfigurable microstrip antenna. The reconfiguration is achieved by using pair of PIN diodes in the antenna feed line switch either mode or mode. In order improve bandwidth and gain for operation, properties J-K inverter split ring resonators are exploited. To demonstrate versatility this concept prototype fabricated tested here. results shows that proposed operates from 3.58 –3.82 GHz, which 4.08 times larger than...

Wireless communication systems are evolving toward multifunctionality. This multi functionality and reconfigurability provides users with options of connecting to different kinds wireless services for many purposes at times by providing additional degrees freedom in the system e.g. cognitive radio, MIMO high performance phased arrays. Although Phase shifters important component RF microwave subsystems radar, array antennas, beam forming networks, frequency translators yet reconfigurable...

The need and importance of circular polarization for wireless communication has been discussed in this paper. antenna exceptional ability to alleviate the harmful influence caused by multipath effects provide insensitivity signals towards transmitter receiver orientation. Polarization reconfiguration realizes frequency reuse is meaningful era shortage also enhances channel capacity security complication systems. This paper covers almost all topology used design a antenna, with suitable...

This paper presents a versatile reconfigurable antenna capable of spectrum sensing along with various reconfiguration features. The proposed senses the by semicircular structure from 3 GHz to 10 identify conditions. After recognizing condition, can reconfigure its polarization state, bandwidth and radiation pattern. Polarization reconfigurability is achieved using switchable slot in circular at 5.1 GHz. Radiation pattern shorting parasitic ring 7 posts via PIN diodes. Bandwidth obtained...

An integrated reconfigurable antenna capable of spectrum sensing along with various reconfiguration features such as polarization, frequency, bandwidth, and radiation pattern is proposed here. The senses the by UWB from 2 to 11 GHz identify conditions. After identifying direction maximum traffic or interference, accordingly reconfigures its in order mitigate interference using switchable shorting posts. can reconfigure polarization state a slot circular antenna. Frequency reconfigurability...

The paper presents an exhaustive visualization of different problems encountered in efficient utilization spectrum for advanced wireless communication. It is a well known fact that there crisis available radio due to incredible expansion and advancement the communication systems technologies. But reality, no shortage but only lack advance techniques perfect spectrum. So, tackle future implications, new emerging field Cognitive Radio explored here. has potential revolutionize way allocation...

In this paper, a rectangular inset feed microstrip antenna with defected ground plane for UWB application is presented. It found that by making symmetrical T-shape slots just beneath the radiating patch in results characteristics. Parasitic effect minimized optimization shape of slot like width and length, so uniform return loss obtained entire range. The simulated fabricated design shows below -12 dB voltage standing wave ratio 2 A very wide impedance bandwidth 11.2 GHz at -10dB has been...

Pregnancy is a time of great anticipation. Hypertension one the common complications and contributes significantly to perinatal mortality morbidity. sign underlying pathology which may be pre-existing or appear for first during pregnancy. The identification clinical entity effective management plays significant role in outcome pregnancy, both mother baby. main aim study was enhance knowledge regarding pregnancy induced hypertension among antenatal mothers through exhibition order improve...

Different semiconductor materials have been used for the fabrication of PIN diodes such as Si, Ge, GaAs, SiC-3C, SiC-4H, and InAs. These different show characteristics advantages SiC-4H is ultrafast switch. But, when flexible polymers composites like Si-nanomembranes, polyethylene terephthalate (PET), biodegradable polymer composite carbon nanotubes (CNT) are fabrication, device has capability to switch from rigid electronic devices wearable devices. composites’ outstanding conductivity,...

This paper proposes a microstrip ultra-wideband (UWB) filter using quarter wavelength long short circuited stubs. The designed is based on 5 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> order Chebyshev lowpass prototype with 0.1dB Passband ripple. structure low cost Arlon substrate relative dielectric constant of 2.6 and thickness 1.27 mm. provides fractional bandwidth (FBW) 106% (3.13 GHz -10.4 GHz) excellent scattering parameters...

This work proposed a dual-element MIMO (Multiple-Input Multiple-Output) antenna designed for the WLAN 5GHz and sub-6GHz applications. The has ground structure of an inverted T-shape two symmetrical hexagon-shaped radiators. Using CST simulator, attributes such as S-parameters, realized gain, current distribution, radiation patterns are investigated. Further, envelope correlation coefficient (ECC), diversity gain (DG), total active reflection (TARC), multiplexing efficiency scrutinized to...