Size-reduced printed log-periodic dipole antenna for wireless communication applications

Yıl 2020, , 1631 - 1646, 07.04.2020

Mehmet Can Ozgonul Mustafa Seçmen

https://doi.org/10.17341/gazimmfd.484537

Öz

In this study, it is proposed a printed log-periodic
dipole antenna (LPDA) for wireless communication applications, which consists
of dipoles having reduced dimensions by using first order semicircle
structures. The bandwidth is increased by adding small rectangular patches to
initial part of antenna feed line and putting slots to the end. A size
reduction of about 14% is obtained in the proposed antenna in comparison with
the standard printed LPDA with the usage of semicircle structures. In addition
to size reduction while semicircle structures also increase the upper band of
the antenna operating frequency to 2.5 GHz to cover wireless communication
frequencies of Bluetooth and 2.4 GHz Wi-Fi, rectangular slot decreases to the
lower band to around 0.86 GHz to include RFID and GSM 900 frequencies.
According to measurement results of the manufactured structure, the antenna is
observed to have return loss better than 10 dB, a quite stable/low variation
gain as 4.75 dBi ± 0.75 dBi and compact size as compared to similar studies in
literature at a wideband operating frequency of 0.86 GHz and 2.5 GHz, which can
be used in several wireless communication systems.

Anahtar Kelimeler

size-reduced antenna, wideband antenna, wireless communication systems, Log-periodic dipole antenna, wireless communication systems

Kablosuz haberleşme uygulamaları için boyutu küçültülmüş basılı log-periyodik çift kutuplu anten

Öz

Bu çalışmada, kablosuz haberleşme uygulamaları
için boyutları birinci dereceden yarı çember yapılar kullanılarak azaltılmış çift
kutuplardan oluşan bir basılı log-periyodik çift kutuplu anten (LPÇKA) önerilmiştir.
Antenin besleme hattının başlangıcına dikdörtgen küçük yamalar eklenmesi ve
sonuna dikdörtgen oyuklar açılarak bant genişliği arttırılmıştır. Yarı
çemberlerin kullanımı ile standart basılı LPÇKA’in boyutlarına göre önerilen
antende yaklaşık %14 oranında bir azalma elde edilmiştir. Yarı çember yapılar,
boyut küçültmenin yanında antenin çalışma frekansının üst bandını Bluetooth ve
2,4 GHz Wi-Fi kablosuz haberleşme frekanslarını da kapsayacak şekilde 2,5 GHz’e
çıkarmış olup dikdörtgen yarık ise alt bandı RFID ve GSM 900 frekanslarını
içerecek şekilde 0,86 GHz seviyelerine çekmiştir. Üretilen yapının ölçüm
sonuçlarına göre, antenin birçok kablosuz haberleşme uygulamasında
kullanılabilecek şekilde 0,86 GHz ile 2,5 GHz aralığı gibi geniş bir çalışma
frekansında 10 dB’den iyi geri dönüş kaybına, 4,75 dBi ± 0,75 dBi gibi oldukça
kararlı/düşük değişimli bir anten kazancına ve literatürdeki benzer çalışmalara
göre daha küçük boyutlara sahip olduğu görülmüştür.

Anahtar Kelimeler

boyutu küçültülmüş anten, geniş bantlı anten, Log-periyodik çift kutuplu anten, kablosuz haberleşme sistemleri

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