scholarly journals A Complete Practical Ultra Wideband Test Bed in X-Band

Author(s):  
Gholamreza Askari ◽  
Khatereh Ghasemi ◽  
Hamid Mirmohammad
Keyword(s):  
Test Bed ◽  
2020 ◽  
Vol 14 (11) ◽  
pp. 1216-1221
Author(s):  
Rajanikanta Swain ◽  
Deepak Kumar Naik ◽  
Asit Kumar Panda

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Thomas Kaufmann ◽  
Akhilesh Verma ◽  
Van-Tan Truong ◽  
Bo Weng ◽  
Roderick Shepherd ◽  
...  

A planar antenna for ultra-wideband (UWB) applications covering the 3.1–10.6 GHz range has been designed as a test bed for efficiency measurements of antennas manufactured using polymer conductors. Two types of conductive polymers, PEDOT and PPy (polypyrrole), with very different thicknesses and conductivities have been selected as conductors for the radiating elements. A comparison between measured radiation patterns of the conductive polymers and a copper reference antenna allows to estimate the conductor losses of the two types of conductive polymers. For a 158 μm thick PPy polymer, an efficiency of almost 80% can be observed over the whole UWB spectrum. For a 7 μm thick PEDOT layer, an average efficiency of 26.6% demonstrates, considering the room for improvement, the potential of this type of versatile materials as flexible printable alternative to conductive metallic paints. The paper demonstrates that, even though the PEDOT conductivity is an order of magnitude larger than that of PPy, the thicker PPy layer leads to much higher efficiency over the whole UWB frequency range. This result highlights that high efficiency can be achieved not only through high conductivity, but also through a sufficiently thick layer of conductive polymers.


Author(s):  
Harfan Hian Ryanu ◽  
Dhoni Putra Setiawan ◽  
Edwar

Antena Ultra-Wideband (UWB) dengan karakteristik natural pita lebar adalah solusi yang baik dalam memenuhi kebutuhan perkembangan teknologi nirkabel yang saat ini membutuhkan antena yang dapat beroperasi pada beberapa pita layanan sekaligus. Namun, antena UWB tidak terlepas dari permasalahan interferensi elektromagnetik pada beberapa layanan yang tidak digunakan. Oleh karena itu, diperlukan modifikasi pada antena UWB agar dapat mengatasi permasalahan interferensi elektromagnetik tersebut. Dalam makalah ini, perancangan antena mikrostrip UWB berbentuk heksagonal monopole planar dengan karakteristik peningkatan lebar pita menggunakan struktur Electromagnetic Band Gap (EBG) dan triple notch band dengan menggunakan tiga jenis slot telah dilakukan. Pengujian dilakukan dengan mengintegrasikan struktur EBG untuk dapat bekerja pada rentang lebar pita 2,8–16 GHz pada antena, lalu menambahkan kombinasi slot berbentuk huruf L, slot horizontal, dan slot melingkar dengan ukuran dimensi yang berbeda ke dalam patch untuk mendapatkan penolakan tiga pita frekuensi, yaitu pada frekuensi WLAN (4,9−6,2 GHz), komunikasi downlink satelit X-Band (7,1−7,6 GHz), dan komunikasi Direct Broadcasting Satellite (DBS) (12,2−12,7 GHz). Dengan metode ini, berhasil diperoleh peningkatan lebar pita antena UWB dari 7,72 GHz menjadi sebesar 13,22 GHz, tanpa mengubah karakteristik pola radiasi antena. Penambahan tiga notch band juga berhasil diimplementasikan tanpa harus mengubah dimensi antena keseluruhan, yaitu sebesar 35,6 mm × 27,3 mm.


2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
A.I. Semenikhin ◽  
◽  
D.V. Semenikhina ◽  
Y.V. Yukhanov ◽  
◽  
...  

Modern low-profile ultra-wideband antenna arrays are tightly coupled dipole array (TCDA). The paper presents a model of a low-profile dual-polarized of planar-type TCDA for operation in the 4÷12 GHz band with scanning in the sector of angles ±30° in two principal planes. In contradistinction to the well-known TCDAs, the proposed array is distinguished by its simplicity of design, the absence of balancing transformers, the extended period of 12x12mm, and the small height of 5.63mm (including the thickness of the upper homogeneous non-perforated matching layers of 1.67mm and the substrate layers of 3.968mm. The selected array period allows taking into account the special design requirements of the feed network for the array elements. The broadband of the TCDA (at VSWR<3.6) is achieved using the upper matching layers. These layers also serve as the radome for the array.


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