1. Miniaturized Compound Spiral Slot Antennas
2. Miniaturized Compound Spiral Slot Antenna Booster
3. Miniaturized Compound Spiral Slot Antenna Tuner

This paper proposes a compact spiral antenna with an improved bandwidth and miniaturized radiator for 3:1 (2‐6 GHz) wideband antenna beamforming arrays. The proposed antenna is composed of an Archimedean spiral antenna (ASA) with an annular ring and additional dielectric substrates with a circular hole. The antenna structure uses two crossed slots further miniaturized using a method derived from a recent study on miniaturized spiral slot antenna. At an operating frequency of 1 GHz, the antenna is capable of achieving efficiency greater than 90% with a size as small as 0.08.?

Abstract

The implantable medical devices (IMDs) are one of the most important advanced healthcare systems. Nowadays, the devices which are designed to monitor physiological data from inside the human body have great promises to provide major contributions to disease prevention, diagnosis and therapy thus reducing hospitalization terms and improving the patients ’ quality of life. It is recognized that modern wireless technology will play an important role in the biomedical application. Essential elements of implantable devices are antenna embedded in system contains Biosensors and interface circuits, which enable the exchange of data between implantable devices and external environment. In this paper, the implantable slot antenna which operates at MICS band (402-405 MHz) has been designed. This implantable antenna is a combination of meander slots and square spiral slots have been embedded for effective size reduction at a fixed frequency operation. Compared to traditional planar inverted-F antennas (PIFAs), the proposed antenna has advantages of good size reduction and also being easy to be optimized to the necessary resonance frequency. This design would fulfill the requirements of biocompatibility, miniaturization, patient safety, and high-quality communication with exterior equipment.

Home > Vol. 91 > pp. 97-113

DESIGN OF MINIATURIZED QUAD-BAND DUAL-ARM SPIRAL PATCH ANTENNA FOR RFID, WLAN AND WIMAX APPLICATIONS

By A. A. S. A. Jabar and D. K. NajiFull Article PDF (1,570 KB)
Abstract:
In this paper, a new design approach is presented for achieving a miniaturized quad-band microstrip patch antenna (MPA) suitable to be used for 915-MHz (UHF band), 2.45- and 5.8-GHz (ISM band), and 3.5-GHz (WiMAX band). The proposed antenna is called modified square spiral antenna (MSSA) which is composed of a modified dual-arm square spiral patch strip structure and a tapered-ground plane with coplanar wave-guide (CPW)-fed configuration to feed this antenna, all printed on the top side of an FR4 substrate. The proposed antenna is designed through intermediate systematic design steps of antennas starting from a conventional strip-fed rectangular MPA and ending by achieving MSSA. A CST Microwave Studio (CST MWS) is used to model the designed antenna and simulation results, in terms of return loss (S₁₁), realized peak gain and efficiency, besides to radiation patterns, are obtained. To validate the design concept, the antenna structure is fabricated, and the simulated and measured

Miniaturized Compound Spiral Slot Antennas

S₁₁ results nearly coincid with each other. The proposed antenna is characterized by miniaturized size of 28×28 mm², and based on measured -10-dB S₁₁ result, MSSA has four bands, band 1: 915-GHz (872-929 MHz), band 2: 2.45-GHz (2395-2510 MHz), band 3: 3.5-GHz (3470-3550 MHz), and band 4: 5.8-GHz (5698-5900 MHz).

Citation:
A. A. S. A. Jabar and D. K. Naji, 'Design of Miniaturized Quad-Band Dual-Arm Spiral Patch Antenna for RFID, WLAN and WiMAX Applications,' Progress In Electromagnetics Research C, Vol. 91, 97-113, 2019.
doi:10.2528/PIERC19011706
http://www.jpier.org/pierc/pier.php?paper=19011706

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Miniaturized Compound Spiral Slot Antenna Booster

Miniaturized Compound Spiral Slot Antenna Tuner

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