scholarly journals A CPW-Fed Quasi-PIFA Antenna Using Quasi-Lumped Resonators for Mobile Phones

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Majid Rafiee ◽  
Mohd Fadzil bin Ain ◽  
Aftanasar Md. Shahar
Keyword(s):  
Mobile Phones ◽  
Patch Size ◽  
Return Loss ◽  
Single Layer ◽  
Operating Frequency ◽  
Antenna Gain ◽  
Term Evolution ◽  
Lumped Elements ◽  
Small Room

A novel single CPW-fed Quasi-Planar Inverted-F Antenna (PIFA) using quasi-lumped elements is developed for mobile communication handheld terminals operating at 2.6 GHz. The antenna is composed of an inductor covered by a set of interdigital and parasitic capacitors. The proposed antenna achieves a measured bandwidth of 11% for return loss with the antenna gain of about 4 dBi. The antenna is designed in single layer (zero height) which is appropriate to be used in thin devices where a small room is considered for the antenna. The proposed antenna is suitable for use in Long Term Evolution band 7. The operating frequency of introduced antenna depends on the number of interdigital fingers and inductor length rather than the total resonator patch only, so that the operating frequency can be altered while the total patch size remains unchanged. The calculated operating frequency is confirmed by simulation and measurement. Also the dipole-like simulated radiation pattern is confirmed by measurement.

scholarly journals Design of a MIMO Antenna with Improved Isolation Using MNG Metamaterial

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Youngki Lee ◽  
Deukhyeon Ga ◽  
Jaehoon Choi
Keyword(s):  
Correlation Coefficient ◽  
Return Loss ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Impedance Bandwidth ◽  
Negative Permeability ◽  
Split Ring ◽  
Mimo Antenna ◽  
Term Evolution

A multi-input multi-output (MIMO) antenna with improved isolation using an interdigital split ring resonator (SRR) is proposed. The necessary impedance bandwidth is obtained by utilizing the coupling between the meander strip and an invertedLstrip. Using interdigital SRR, a negative permeability was generated, while achieving improved isolation between the two radiating elements. The fabricated antenna satisfies the 10 dB return loss in the long-term evolution (LTE) band 40 from 2.3 GHz to 2.4 GHz. The measured peak gains of the two elements were 2.0 dBi and 1.3 dBi. The measured envelope correlation coefficient was less than 0.16 over the frequency band of interest.

scholarly journals Miniaturized PIFA for 5G Communication Networks

2020 ◽  
Vol 10 (4) ◽  
pp. 1326 ◽  
Author(s):  
Eugene Rhee
Keyword(s):  
Radiation Pattern ◽  
Communication Networks ◽  
Mobile Communication ◽  
Antenna Gain ◽  
Communication Services ◽  
Term Evolution ◽  
Key Characteristics ◽  
5G Communication ◽  
Internal Antenna

This paper designed a miniaturized Planar Inverted-F Antenna for 5G communication networks, including Long-Term Evolution Advanced mobile communication services. By showing the radiation pattern, voltage standing wave ratio, and antenna gain of the designed Planar Inverted-F Antenna, this paper evaluates its performance. To show the key characteristics of the Planar Inverted-F Antenna, this paper modeled and simulated it with various variances. Moreover, the real Planar Inverted-F Antenna was fabricated and measurements were done to validate the simulated characteristics of the internal antenna.

scholarly journals Design of a Compact MIMO Antenna Using Coupled Feed for LTE Mobile Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Xing Zhao ◽  
Youngki Lee ◽  
Jaehoon Choi
Keyword(s):  
Correlation Coefficient ◽  
Mobile Applications ◽  
Return Loss ◽  
Impedance Matching ◽  
Antenna Element ◽  
Mimo Antenna ◽  
First Order ◽  
Term Evolution ◽  
Radiating Element

A compact multi-input multi-output (MIMO) antenna with a coupled feed structure for 4th generation (4G) handsets is proposed for operation in long-term evolution (LTE) band 13 (0.746 GHz–0.787 GHz). The MIMO antenna consists of two symmetrically distributed identical antenna elements. The size of each element is limited to 20 mm × 10 mm × 5 mm (λ0=392 mm at 0.765 GHz), and the separation between different elements is minimized to 15 mm. Each antenna element contains a Z-shaped coupled feed strip and a simple folded monopole-type radiating element. The simple folded radiating element supports two monopole modes (first order) excited at adjacent frequencies to achieve broadband performance. The coupled feed strip effectively modifies impedance matching and maintains good isolation. The proposed antenna has a 6 dB return loss bandwidth of 55 MHz (0.735 GHz–0.79 GHz) and isolation above 12 dB without the use of an additional isolation enhancement element. Moreover, the envelope correlation coefficient (ECC) is maintained below 0.5 over the designed frequency band.

scholarly journals CASCADED SQUARE LOOP BANDPASS FILTER WITH TRANSMISSION ZEROS FOR LONG TERM EVOLUTION (LTE)

SINERGI ◽  
2018 ◽  
Vol 22 (1) ◽  
pp. 63
Author(s):  
Iis Andini ◽  
Dian Widi Astuti ◽  
Muslim Muslim
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
External Resonator ◽  
Transmission Zeros ◽  
Term Evolution ◽  
Compact Size ◽  
Measurement Results ◽  
Resonator Method

In this paper, we present a bandpass filter that passed frequency of 1.7 GHz – 1.8 GHz. It is applied for an uplink frequency in 4G 1800MHz. This filter is created by using substrate PCB TMM-10i and has a compact size of 42 mm x 42 mm. The compact size is also important besides selectivity. The selectivity is achieved by implementing cascade square loop resonator method which generated transmission zeros. Actually, transmission zeros are obtained from the coupled resonator. The bandpass filter is designed by adding an external resonator on each square of the resonator loop and a patch to the inside of the square loop resonator. The parameter performances are simulated by HFSS. The parameter performances for return loss value is 14.24 dB at frequency 1.75 GHz and insertion loss value is 0.65 dB at frequency 1.75 GHz. By using VNA Anritsu MS 2026A, prototype bandpass filter is measured. The measurement results for return loss value is 6.8 dB and insertion loss value is 2.2 dB.

scholarly journals The Development of Cascode Low Noise Amplifier with Double Feedback Technique Architecture for Wireless Communication

2021 ◽  
Vol 87 (2) ◽  
pp. 82-89
Author(s):  
Abu Bakar Ibrahim ◽  
Nurul Husna Abdul Kahar ◽  
Hafizul Fahri Hanafi ◽  
Ashardi Abas ◽  
Shamsul Arrieya Ariffin
Keyword(s):  
Wireless Communication ◽  
Return Loss ◽  
Noise Figure ◽  
Long Term Evolution ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Design System ◽  
Term Evolution ◽  
Noise Amplifier

The paper aims to develop a new cascode low noise amplifier (LNA) by using double feedback technique architecture for wireless communication especially for long term evolution (LTE). The objective of this article is to display the improved performance of gain by minimizing noise figures with innovative techniques for the realization of Long Term Evolution (LTE). The innovation technique with implementation double feedback technique architecture outlines the possibility to improve the performance in various parameters such as bandwidth, stability, gain, noise figure, power consumption and complexity. The realization using cascode LNA is verified by using FHX76LP Super Low Noise HEMT that operate at 5.8 GHz in compliant with LTE standard. The Advance Design System (ADS) software is used to obtain characteristics for collecting data in a smith chart and s-parameter generated by simulation. The cascode LNA with the double feedback technique achieves an average gain of 20.887 dB with a noise figure of 0.341 dB. The input return loss and output return loss are – 14.354 dB and – 11.879 dB respectively. The outcome of this work will contribute to providing a better wireless signal receiver especially for the LTE standard and it potentially addressing wireless communication issues in rural areas.

scholarly journals Perancangan Dan Analisis Antena Mikrostrip Mimo Circular Pada Frekuensi 2.35 GHz Untuk Aplikasi LTE

2017 ◽  
Vol 9 (1) ◽  
pp. 136
Author(s):  
Imam M.P Budi ◽  
Eka Setia Nugraha ◽  
Andika Agung
Keyword(s):  
Return Loss ◽  
Long Term Evolution ◽  
Term Evolution

LTE (long Term Evolution) merupakan teknologi komunikasi wireless generasi keempat yang saat ini sedang mengalami perkembangan. Salah satu perangkat yang sangat dibutuhkan pada teknologi tersebut adalah antenna. Teknik yang digunakan adalah teknik MIMO. Teknik MIMO menggunakan multiantena baik di sisi transmitter maupun di sisi receiver dengan koefisien korelasi di bawah 0.2. Untuk menghasilkan nilai koefisien korelasi di bawah 0.2, antena menggunakan ?/2 untuk jarak antar dua antena. Perancangan dan realisasi antena pada skripsi ini dipergunakan untuk aplikasi LTE yang bekerja pada frekuensi 2.3 GHz sampai 2.4 GHz. Simulasi antena menunjukkan frekuensi kerja yang direncanakan yaitu antara 2.3 GHz – 2.4 GHz, memiliki Return Loss -38.582 dB dan VSWR 1.0238 pada frekuensi tengah 2.350 MHz, gain sebesar 4.332 dBi. Hasil pengukuran antena satu terdapat pergeseran frekuensi dari 2.300 MHz - 2.400 MHz menjadi 2.310 - 2.384 MHz, antena  ini memiliki  Return  Loss -35.476 dB dan VSWR 1.034. Bandwidth 74 Mhz. Untuk antena dua terdapat pergeseran frekuensi menjadi 2.310 - 2.382 MHz, dengan Return  Loss -33.637 dB  dan VSWR  1.042. Bandwidth 72 MHz. Pada frekuensi 2.35 GHz gain sebesar 8 dBi dengan pola radiasi unidirectional dan polarisasi elips. Dari perancangan dan analisis tersebut, maka antena ini dapat digunakan sebagai antena teknologi LTE

scholarly journals Capacitive Disc Fed GPS Antenna Operating at L Band

2019 ◽  
Vol 8 (10) ◽  
pp. 3656-3659
Keyword(s):  
Reflection Coefficient ◽  
Return Loss ◽  
Operating Frequency ◽  
Impedance Bandwidth ◽  
Antenna Gain ◽  
L Band ◽  
Simulation Results ◽  
Gps Antenna

A rectangular antenna, to work in the operating frequency of L band is designed with capacitive disc fed for GPS application. The antenna gain aimed to have 2dBi. The capacitive disc is utilized for the increment of impedance bandwidth. It is designed using CADFEKO 7.0 and obtained the output with improved bandwidth and good return loss. Moreover, much improved reflection coefficient of the proposed antenna is obtained and it has been analyzed. With reference to simulation results, reflection coefficient at 1.13 GHz is attained as -34.18 dB with bandwidth of 140 MHz and at 1.34 GHz is -26.13 dB with the bandwidth of 230 MHz.

scholarly journals Examination of Multiband IFA for UHF and SHF Channel Applications

2018 ◽  
Author(s):  
Erfan Rohadi ◽  
Amalia Amalia ◽  
Indrazno Siradjuddin ◽  
Ferdian Ronilaya ◽  
Rosa Andrie Asmara
Keyword(s):  
Numerical Analysis ◽  
Mobile Phones ◽  
Wireless Lan ◽  
Return Loss ◽  
Band 3 ◽  
Antenna Gain ◽  
Method Of Moment ◽  
Conducting Plane ◽  
Parasitic Element ◽  
Wireless Service

The Inverted F Antenna (IFA) with the parasitic element on a finite conducting plane is proposed in the range frequency of 0.1 to 5.5 GHz and its characteristics are analyzed numerically. In this research, the parasitic element and the main IFA are investigated to obtain the resonance frequency for multiband operation purposes. The parasitic element is placed beneath adjusted to the main IFA to derive more frequency bands. The distance between the parasitic element and main horizontal element extremely affects the performance of the IFA. It is found that when the parasitic element is located closer to the conducting plane, this element is coupled by the current on the conducting plane. Consequently, the return loss bandwidth becomes narrower. Therefore, the gain of the proposed IFA becomes a bit higher. The antenna gain is about 8.21 dB at band #3 (λ1.747), 7.43 dB at band #5 (λ2.967) and 8.82 dB at band #6 (λ4.023). This occurs when the calculation condition is antenna height h1 = 23 mm, h2 = 21 mm, horizontal antenna elements L = 173.2 mm, L1 = 140.9 mm and Lp = 152 mm, shorted element Ls = 30.7 mm, the distance between parasitic element and shorted element pyl = 5 mm. While the size of conducting plane is considered pxp+pxm by pyp+pym as 57.5+57.5 mm by 200+50 mm. In the numerical analysis, the electromagnetic simulator WIPL-D based on Method of Moment is used. The results show that the proposed IFA has UHF and SHF channel receiver which are suitable for advanced wireless service (band #3), mobile phones, Bluetooth, maritime service, radiolocation service (band #5) and radars, mobile phones, commercial wireless LAN (band #6).

scholarly journals Desain dan Implementasi Duplekser dengan Metoda Pseudo-Interdigital untuk Uplink dan Downlink LTE

2016 ◽  
Vol 13 (2) ◽  
pp. 73
Author(s):  
Enceng Sulaeman ◽  
Yaya Sulaeman ◽  
Asep Yudi Hercuadi
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Long Term Evolution ◽  
Full Duplex ◽  
Frequency Division ◽  
Time Division Duplex ◽  
Term Evolution ◽  
Time Division

Duplekser merupakan perangkat yang dapat mengisolasi receiver dari transmitter saat keduanya saling berbagi antena yang sama, digunakan agar komunikasi bisa berjalan secara full duplex. Ada dua metode transmisi duplex yaitu frequency division duplex (FDD) dan time division duplex (TDD). FDD merupakan teknik duplex yang menggunakan dua frekuensi yang berbeda untuk melakukan komunikasi dalam dua arah, sedangkan TDD menggunakan frekuensi tunggal dan frekuensi tersebut digunakan oleh semua kanal untuk melakukan pengiriman dan penerimaan data. Gabungan dua bandpass filter dengan metoda pseudo-interdigital untuk aplikasi LTE (long term evolution). Metode ini lebih unggul dibandingkan duplekser dengan metoda hybrid. Duplekser bekerja pada FDD LTE band ke-7 yaitu frekuensi uplink 2500-2570 MHz dan downlink 2620-2690 MHz. Dari hasil pengukuran diperoleh sebagai berikut: nilai frekuensi center pada uplink 2639 MHz dan pada downlink 2659 MHz, insertion loss pada uplink 1,561 dB dan downlink 1,74 dB, bandwidth ±70 MHz, isolasi 23,03 dB, serta nilai return loss 23,5 dB pada uplink dan downlink 23,45 dB.

RANCANG BANGUN ANTENA MIKROSTRIP RECTANGULAR DENGAN METODE FRACTAL SIERPINSKI UNTUK TEKNOLOGI LONG TERM EVOLUTION 2300 MHz

2021 ◽  
Vol 8 (1) ◽  
pp. 934
Author(s):  
Eka Setia Nugraha
Keyword(s):  
Return Loss ◽  
Multiple Input Multiple Output ◽  
Long Term Evolution ◽  
Term Evolution ◽  
Multiple Input ◽  
Input Multiple Output

Teknologi yang saat ini berkembang adalah Long Term Evolution (LTE) yang bekerja pada frekuensi 1800 MHz, 2100 MHz, dan 2300 MHz. Untuk mendukung teknologi LTE dibutuhkan desain antena yang sesuai spesifikasi LTE , salah satunya adalah Antena mikrostrip yang mendukung Multiple Input Multiple Output (MIMO) , dimana pada tipe ini dapat memungkinkanya menggunakan lebih dari satu antena, baik dalam sisi pengirim (trasmitter) dan sisi penerima (reciever). Dikarenakan memungkinkan untuk penggunaan antena lebih dari satu. Pada penelitian ini menggunakan suatu model antena mikrostrip MIMO dengan metode fraktal sierpinski yang bertujuan untuk meningkatkan nilai dari bandwidth sehingga dapat melakukan suatu transmisi data yang cepat. Pada antena ini menghasilkan nilai dari parameter return loss diperoleh nilai -12,05 dB untuk antena 1 dan -16,75 dB untuk antena 2 hasil pengukuran, dan pada hasil simulasi menghasilkan nilai -14,88 dB, untuk nilai impedansi diperoleh nilai pengukuran antena 1 yaitu 32,33 Ohm dan antena 2 43,4 Ohm, untuk simulasi menghasilkan nilai 50 Ohm, untuk gain pada saat simulasi menghasilkan nilai 5,084 dB dan di pengukuran menghasilkan nilai 2,7 dB, untuk nilai bandwidth simulasi bernilai 20 MHz, dan pada saat pengukuran antena 1 menghasikan nilai 18 MHz dan antena 2 15 MHz, serta pola radiasi untuk hasil simulasi dan pengukuran menunjukan pola radiasi yaitu Unidirectional.

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