Meander-type Antenna Research Articles

Design and miniaturization of dual band implantable antennas

Two types of miniaturized dual band implantable antennas are designed and presented, one of a meander type and the other is the so called comb antenna. In medical applications the electromagnetic characteristic changes of tissue in different situations and the corresponding resonant frequency shifts, should not disturb the data transmission. The objective is to design dual band antennas in 400 MHz and 2.4 GHz with suitable bandwidths and small sizes. The meander type antenna was fabricated and its S parameters were measured using an equivalent liquid phantom of skin, fat and muscle which included propanol, butanol, purified water and salt. The experimental results are shown and compared.

THz photomixer with milled nanoelectrodes on LT-GaAs

A terahertz (THz) photomixer: (i) a meander type antenna with integrated nanoelectrodes on (ii) a low temperature grown GaAs has been fabricated and characterized. It was designed for spectral range of 0.3–0.4 THz where molecular fingerprinting and sensing are performed. By combination of electron beam lithography with post-processing using focused ion beam (FIB), milling the THz emitter was successfully fabricated. Nanogaps as small as 40 nm width in the active area of photomixer were milled by FIB. Nanocontacts enhance electric fields of the illuminated and THz radiation and contribute to a better collection of photo-electrons. THz emission was obtained and spectrally characterized.

Tunable meander-type antenna integrated with a bluetooth module in PCB board

In this paper, a tunable antenna integrated with a Bluetooth module in printed circuit board (PCB) board for Bluetooth application was proposed and experimentally studied.The proposed tunable antenna consisted of meander-type stack antenna, Bluetooth module, strip line, and chip capacitors in PCB board. The simulation results for the effect of the variation of chip capacitor in PCB board for Bluetooth application were investigated. From the experimental results, the measured impedance bandwidth, defined by VSWR = 2, was obtained. Also, 3D radiation patterns and peak and average gains were measured and studied. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2801–2804, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25618

Compact meander‐type antenna integrated with the module package for Bluetooth operation

AbstractThis article presents a compact meander‐type antenna integrated with the module package for Bluetooth application. Theantenna consists of a lower patch in the bottom layer, an upper patch in the top layer, and a three via for connecting the two layers. The proposed antenna with module package, which is integrated to the module package through shorted‐circuiting, have been designed and successfully implemented. From experimental results, the measured impedance bandwidth, defied by S11 = −7.5 dB, can reach an operating bandwidth of 220 MHz (2.34–2.56 GHz). Also, 3D radiation patterns and peak and average gains within the operating band are measured and studied. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 458–462, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24932

Dual‐band LTCC chip antenna design using stacked meander patch for mobile handsets

AbstractThis paper presents design simulation, implementation, and measurement of a miniaturized GPS/K‐PCS dual‐band LTCC chip antenna for mobile communication handsets. The dimensions of the LTCC chip antenna is 9 × 15 × 1.2 mm. The meander‐type radiating patch for dual‐band operation is realized by using via holes with 0.3‐mm height to connect upper‐ and lower‐layer antennas. The lower meander‐type antenna is to be tuned to the lower frequency (GPS) band. The upper meander antenna has a via‐hole connection for the higher frequency (K‐PCS) band. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 271–273, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20793

Design of a half-bowtie-shaped meander-type microstrip patch antenna for wide impedance bandwidth

This paper presents the characteristics of a half bowtie-shaped, meander-type antenna for broadband impedance bandwidth. The design was based on a modified meander line and a bowtie shape with coaxial feeding. The maximum measured impedance bandwidth (−10 dB) was approximately 1.5075 GHz (5.5775–7.085 GHz), or about 23.8%. Radiation patterns at different frequencies are presented herein. The measured antenna gain ranges from about 3.43 to 6.73 dBi. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 44: 390–392, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20645

Compact dual-band LTCC meander-chip antenna with gap stub for mobile handsets

This paper presents design simulation, implementation, and measurement of a miniature GPS/K-PCS dual-band LTCC chip antenna for mobile-communication handsets. The dimensions of the LTCC chip antenna are 9 × 15 × 1.2 mm. The lower meander-type antenna is tuned to the lower-frequency (GPS) band and the upper meander antenna with via-hole connection contributes to the higher-frequency (K-PCS) band. In order to lower the resonant frequency for the GPS band, a printed modified meander antenna with gap stub is used for integration with K-PCS band operation. The measured impedance bandwidths (VSWR ≤ 2) are 55 and 120 MHz at the resonant frequency, respectively. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 431–433, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21007

Design of a modified meander‐type microstrip patch antenna in the 5‐GHZ band

AbstractIn this paper, the characteristics of a modified meander‐type antenna for broadband impedance bandwidth are investigated in the 5‐GHz band. The design is based on a modified meander‐line width in a finite‐sized ground with coaxial SMA feeding. The modified meander‐type microstrip patch antenna is able to achieve an impedance bandwidth of about 1.0 GHz or 17.5% for a VSWR of less than 2. Radiation patterns are broad across the pass band. The gain is measured 7.3–9.5 dBi. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 181–183, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11322