Modified Meander Line Research Articles

Miniaturized Microstrip Dual-Channel Diplexer Based on Modified Meander Line Resonators for Wireless and Computer Communication Technologies

There has been a lot of interest in microstrip diplexers lately due to their potential use in numerous wireless and computer communication technologies, including radio broadcasts, mobile phones, broadband wireless, and satellite-based communication systems. It can do this because it has a communication channel that can combine two distinct filters into one. This article presents a narrow-band microstrip diplexer that uses a stepped impedance resonator, a uniform impedance resonator, tiny square patches, and a meander line resonator. The projected diplexer might be made smaller than its initial dimensions by utilizing the winding construction. To model the microstrip diplexer topology for WiMAX and WIFI/WLAN at 1.66 GHz and 2.52 GHz, the Advanced Wave Research (AWR) solver was employed. It exhibited an insertion loss of 3.2 dB and a return loss of 16 dB for the first channel, while the insertion loss and return loss were 2.88 dB and 21 dB, respectively, for the second channel. When both filters were simulated, the band isolation was 31 dB. The projected microstrip diplexer has been fabricated using an FR4 epoxy laminate with dimensions of 32 × 26 mm2. The simulated S-parameters phase and group delay closely matched the measurements.

A UHF CPW-fed patch antenna for nanosatellite store and forward mission

This paper reveals a new design of a meander line ultra-high frequency (UHF) nanosatellite antenna for nanosatellite communication, intended for potential applications in nanosatellite store and forward missions. The design utilizes a modified meander line as principal radiating element. Co planer waveguide feeding with LC impedance has been applied for impedance matching to result in a compact UHF antenna of 40 × 40 mm2 dimension. The prototype is fabricated using Rogers 5880 and measured. The antenna achieved resonance at 900 MHz. Response of the antenna have been investigated in free space and while mounted with a nanosatellite structure. The antenna achieved resonance at 900 MHz in free space and at 896 MHz with the nanosatellite structure. This phenomenon has been analyzed considering a typical 1U nanosatellite body with the antenna. The antenna achieved positive realized gain of 0.74 dB at the resonant frequency with approximately 67% of radiation efficiency.

Flexible Radio-Frequency Identification (RFID) Tag Antenna for Sensor Applications.

In this paper, an inkjet-printed flexible Radio-Frequency Identification (RFID) tag antenna is proposed for an ultra-high frequency (UHF) sensor application. The proposed tag antenna facilitates a system-level solution for low-cost and faster mass production of RFID passive tag antenna. The tag antenna consists of a modified meander line radiator with a semi-circular shaped feed network. The structure is printed on photo paper using silver nanoparticle conductive ink. The generic design outline, as well as tag antenna performances for several practical application aspects are investigated. The simulated and measured results verify the coverage of universal UHF RFID band with an omnidirectional radiation pattern and a long-read range of 15 ft. In addition, the read range for different bending angles and lifetimes of the tag antenna are also demonstrated.

A Slow-Wave Rat-Race Coupler Using Substrate Integrated Suspended Line Technology

This paper presents a slow-wave rat-race coupler using substrate integrated suspended line (SISL) technology. Double-sided interconnected strip line (DSISL) is utilized to further reduce the loss of the suspended line circuit. Using the DSISL concept, a slow-wave structure based on modified meander line configuration is proposed. Formed by simple circuit topology with only three parameters of one unit cell, the characteristic impedance and slow-wave factor of the proposed slow-wave DSISL can be controlled separately. Utilizing the proposed slow-wave DSISL, a rat-race coupler at 1.5 GHz has been designed and fabricated by standard printed circuit board process. A 90.5% size reduction is achieved, and the fractional bandwidth is 26.5%. Benefiting from SISL technology, the proposed slow-wave rat-race coupler is self-packaged and has advantages of low cost and light weight.

New Folded Tag Antenna with Chanel Shaped Metamaterial

In this paper, a new metamaterial based tag antenna is presented for ultra-high frequency (UHF) passive radio frequency identification (RFID). The modified meander line and the capacitive-tip loading are adopted for the dipole radiated element. A new planner Chanel shaped unit cell is incorporated in the ground plane. The compact antenna has a miniaturized size of 22mm × 18.5mm (0.067λ×0.056λ at 915MHz). Optimized results show that the antenna has a large impedance bandwidth of 196MHz (21.42%) with minimum reflection coefficient of -35.52dB. All tag design setups are detailed and discussed.

A multiband film type inverted F-antenna for GSM, DCS, PCS, USPCS, and WCDMA bands

A novel and simple design of a film type inverted F-antenna for global system for mobile (GSM), digital cellular system (DCS), personal communication system (PCS), US personal communication system (USPCS), and wideband code division multiple access (WCDMA) bands is proposed. The obtained impedance bandwidths reached 87 (880–967) MHz and 451 (1710–2162) MHz in the GSM, DCS, PCS, USPCS, and WCDMA bands. For multiband operation, a modified meander line structure with L-shaped short pin was used. The measured peak antenna gains for the operating frequencies were 3.18–4.24 dBi. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2757–2762, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27195

Modified meander line monopole antenna for broadband operation

A modified meander line monopole antenna is presented for broadband operation. The impedance and radiation characteristics of the antenna are investigated. The proposed antenna achieved a bandwidth of approximately 845 MHz with S11<−10 dB, which covered the GPS, DCS, PCS, UMTS and WiBro bands. The electrical characteristics of the proposed antenna appear to be attractive for mobile terminals and repeater applications.

Fabrication and measurement of miniaturized Z‐shaped corrugated‐type patch antenna for WLAN

AbstractThis paper presents the characteristics of the miniaturized Z‐shaped meander‐type antenna realized for 5.25‐GHz wireless LAN systems. The proposed antenna consists of the modified meander line, corrugated shape, and shorting pin with coaxial feeding on the two‐layered (air and FR4) substrate, which forms the letter “Z.” This proposed antenna has equivalent performance with about 44.87% of size reduction with respect to conventional antennas. Its maximum measured impedance bandwidth (−10‐dB below) is approximately 300 MHz (5.05–5.35 GHz) or 5.76%, which meets to the bandwidth requirement of WLAN (5.15–5.35 GHz) systems. Details of the proposed antenna are described and experimental results of constructed prototypes also are presented. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1269–1271, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21673

Fabrication and measurement of a compact meander‐line‐type microstrip patch antenna with shorting pin for the 5‐GHz band

AbstractThis paper investigates the characteristics of the modified meander‐line‐type patch antenna for the 5‐GHz band. Its design was based on a modified meander line width and shorting pin with coaxial feeding. Its maximum measured impedance bandwidth (−10 dB and below) reaches approximately 1.64 GHz (4.765–6.405 GHz). Radiation patterns at different frequencies are also discussed, and the measured gains are about 5.74 to 9.09 dBi. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 944–947, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21527

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