A folded slot antenna for planar quasi-optical mixer applications

Robertson, Susan; Dib, Nihad; Yang, Guang; Katehi, L.P.B.

doi:10.1109/aps.1993.385274

Cited by 24 publications

(12 citation statements)

References 8 publications

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“…The penalty in terms of layout is small, since the extra slots are thin and must be situated close to the original slots. Obviously the argument cannot be carried too far; there is a limit to the number of slots that can be added while still satisfying (8). There is an implicit assumption in (7) and (8) that the currents in each dipole or slot are of equal magnitude and in phase, which will not be true for a large number of slots.…”

Section: Impedance Control With Multiple Slotsmentioning

confidence: 99%

FDTD analysis of CPW-fed folded-slot and multiple-slot antennas on thin substrates

Tsai

York

1996

IEEE Trans. Antennas Propagat.

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Folded slot antennas are attractive for active arrays due to relatively large bandwidth, fabrication simplicity, and ease of integration with devices. Currently, there is little design information for these antennas, especially on thin substrates. In this paper, the finite-difference time-domain (FDTD) method is applied to the analysis of CPW-fed folded-slot antennas. The paper describes the problems encountered in the analysis, compares the theoretical results and measured data, and provides some design information for folded slots. In addition, the paper explores the manipulation of input impedance through the use of additional slots, yielding antennas with a broadband 50 R input impedance.

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Section: Impedance Control With Multiple Slotsmentioning

confidence: 99%

FDTD analysis of CPW-fed folded-slot and multiple-slot antennas on thin substrates

Tsai

York

1996

IEEE Trans. Antennas Propagat.

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“…Our general aim is to produce an antenna that is smaller and lighter, not only for reasons of appearance but also to save size and cost. For many consumer products that incorporate such a device, the economic cost consideration is very important [4,5].…”

Section: Introductionmentioning

confidence: 99%

A broadband CPW‐fed nonuniform folded‐slot antenna with a pair of matching slots

Deng

Chiu

Lai

et al. 2004

Micro & Optical Tech Letters

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“…The coplanar waveguide (CPW)-fed folded-slot antennas have been investigated extensively [2][3][4][5][6][7], for which the bandwidth up to 30% can be achieved. The CPW-fed folded slot antennas are thus attractive for mm-wave applications due to their relatively large bandwidths, fabrication simplicity, and ease of integration with three-terminal devices.…”

Section: Introductionmentioning

confidence: 99%

Impedance bandwidth improvement for microstrip-fed slot antennas using short-circuited termination

Lin

Huang

2005

Microw. Opt. Technol. Lett.

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as inductors. C L represents the loading capacitance resulting from the gap between the two microstrip open-ends. C p represents the capacitance between the microstrip and the ground. The equivalent circuit exhibits an elliptic lowpass characteristic. We simulate the proposed lowpass filter using Ensemble by ANSOFT. Low insertion loss in the passband, sharp and wide rejection in the stopband, and compact size are realized. MEASURED RESULTSAn experimental lowpass filter was designed, fabricated, and tested. The filter was fabricated on substrate with relative dielectric constant r ϭ 9.6 and thickness of 0.8 mm. The dimensions of the proposed lowpass filter are shown as follows: a ϭ 1 mm, w 1 ϭ w 3 ϭ 0.2 mm, w 2 ϭ 2 mm, s ϭ 0.2 mm, and w ϭ 0.76 mm and l ϭ 3 mm are the width and length of feed line with 50⍀, respectively. Figure 3 shows the simulated and measured results. The filter has a 3-dB passband from DC to 1.65 GHz. The insertion loss is better than 0.68 dB from DC to 1.35 GHz. The stopband rejection levels are larger than 20 dB from 2.25 to 3.45 GHz. Two attenuation poles are realized at 2.5 and 3.25 GHz. The 2 nd harmonic resonant frequency is at 3.98 GHz. The size of the proposed lowpass filter is 8.6 ϫ 4.96 mm. As can be seen from Figure 3, the simulated results nearly agree with the measured results. However, some discrepancy between them can still be observed, which can be attributed to the unexpected tolerance of fabrication. CONCLUSIONA novel compact microstrip lowpass filter using a meander openloop resonator has been proposed. The advantages of compact size, low insertion loss in the passband, wide stopband, and sharp rejection in the stopband have been verified by simulation and experiment. Without any lumped element, the lowpass filter can be easily fabricated with good repeatability. The lowpass filter is desirable in many microwave-system applications due to its compact size and high performance.

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A folded slot antenna for planar quasi-optical mixer applications

Cited by 24 publications

References 8 publications

FDTD analysis of CPW-fed folded-slot and multiple-slot antennas on thin substrates

FDTD analysis of CPW-fed folded-slot and multiple-slot antennas on thin substrates

A broadband CPW‐fed nonuniform folded‐slot antenna with a pair of matching slots

Impedance bandwidth improvement for microstrip-fed slot antennas using short-circuited termination

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