LTCC Differential-Fed Patch Antennas With Rat-Race Feeding Structures

Chin, Kuo‐Sheng; Liu, Jia-An; Chang, Chih Chun; Cheng, Jui‐Ching

doi:10.2528/pierc12071802

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…Some noncontact type fed patches, stacked patch configuration, mirrored pair feeding mechanism, two layer patch have been employed for the improvement of XP performance. In all those cases, around 15–20 dB of CP‐XP isolation is found with no improvement in impedance bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Wide bandwidth microstrip antenna with defected patch surface for low cross polarization applications

Ghosh

Chattopadhyay

Singh

et al. 2017

Int J RF Microw Comput Aided Eng

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A simple and single element wide slot dipole loaded shorted rectangular microstrip antenna has been proposed and investigated experimentally for broad impedance bandwidth and improved cross polarized (XP) radiation compared to maximum co‐polarized (CP) gain without changing the co‐polarized (CP) radiation pattern. Around 23‐35 dB isolation between CP and XP radiation along with 25% impedance bandwidth is achieved with the proposed structure. The measured gain of the antenna is around 6.2 dBi over the entire band. The present antenna is very simple and easy to manufacture. Unlike the other structures, the present one is free from back radiation in terms of XP fields. The design of the antenna structure is theoretically justified and rigorously analyzed. The present investigation provides an insightful, clear visualization‐based understanding of the concurrent improvement in both the impedance bandwidth and XP performance with the present structure.

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Section: Introductionmentioning

confidence: 99%

Wide bandwidth microstrip antenna with defected patch surface for low cross polarization applications

Ghosh

Chattopadhyay

Singh

et al. 2017

Int J RF Microw Comput Aided Eng

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“…The XP fields are more significant in H plane than in E plane and those are mainly due to higher order orthogonal modes (particularly TM 02 mode) when the antenna radiates at its fundamental TM 10 mode as obtained in open literature [1], [2]. Some non contact type fed patches to improve XP radiation [5]- [8] include stacked patches with dual polarized aperture coupled microstrip antennas (MA), T shaped microstrip line with annular ring slot and rat race feeding technique with differential feed system. However all these structures follow complex feeding methods.…”

Section: Introductionmentioning

confidence: 99%

Improved Cross-Polarized Radiation and Wide Impedance Bandwidth From Rectangular Microstrip Antenna With Dumbbell-Shaped Defected Patch Surface

Chakraborty¹,

Ghosh

Chattopadhyay³

et al. 2016

Antennas Wirel. Propag. Lett.

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“…A rat-race coupler is a four-port network with a 180 • phase difference between the two output ports and can also be operated in phase at the outputs. It is widely adopted in practical microwave and millimeter wave circuits such as mixers [1], amplifiers [2], and antenna feeding networks [3,4]. However, the traditional rat-race coupler, which consists of a 3λ/4 and three λ/4 uniform transmission line sections (UTLS), has inherently large physical size.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized 3-Db Microstrip TRD Coupled-Line Rat-Race Coupler With Harmonics Suppression

Cao¹,

Wang²,

Fang³

et al. 2016

PIER C

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A miniaturized microstrip rat-race coupler with harmonics suppression is proposed by using shorted trans-directional (TRD) coupled lines. The shorted TRD coupled lines consist of a set of capacitor-loaded λ/4 coupled microstrip lines with two shorts, which are used to replace the 3λ/4 uniform transmission-line section (UTLS) in the traditional 3λ/2 ring coupler for miniaturization. To attain perfect matching for any coupling factor of the TRD coupled lines, shorted TRD coupled lines are synthesized and the design equations are derived. To further reduce the ring size, T-type transmissionline equivalent circuits are also adopted to replace the λ/4 UTLS and associated with a transmission zero for harmonic attenuation. Using the proposed method, a microstrip ring coupler with 26.7% circuit size of a traditional one is fabricated and tested. The measured results show that the bandwidth for the return loss of better than 10 dB is 43.9% and that for isolation of better than 20 dB is 18.7% with a maximum isolation of 40.6 dB. There is no spurious passband up to the sixth harmonic of the design center frequency with more than 20 dB suppression from the third to fifth harmonics.

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LTCC Differential-Fed Patch Antennas With Rat-Race Feeding Structures

Cited by 8 publications

References 17 publications

Wide bandwidth microstrip antenna with defected patch surface for low cross polarization applications

Wide bandwidth microstrip antenna with defected patch surface for low cross polarization applications

Improved Cross-Polarized Radiation and Wide Impedance Bandwidth From Rectangular Microstrip Antenna With Dumbbell-Shaped Defected Patch Surface

A Miniaturized 3-Db Microstrip TRD Coupled-Line Rat-Race Coupler With Harmonics Suppression

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