Millimeter Wave Printed Circuit Spurline Filters

Nguyen, Cam; Hsieh, Chaoping

doi:10.1109/mwsym.1983.1130821

Cited by 35 publications

(15 citation statements)

References 3 publications

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“…A microstrip spurline filter, [8], acts as a band stop filter. A nice feature of a spurline filter is that the physical structure is completely contained within the boundaries of the microstrip transmission line, see figure 16.…”

Section: Spurline Filter In Microstripmentioning

confidence: 99%

“…A nice feature of a spurline filter is that the physical structure is completely contained within the boundaries of the microstrip transmission line, see figure 16. The spurline filter reflection and transmission may be relatively easy calculated using the closed formulas for the elements of the ABCD matrix given in [8]. In these equations use may be made of the static even and odd mode effective permittivities and characteristic impedances for parallel coupled microstrip lines of [9,10].…”

Section: Spurline Filter In Microstripmentioning

confidence: 99%

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Low-cost, compact UWB antenna with frequency band-notch function

Visser¹

2007

2nd European Conference on Antennas and Propagation (EuCAP 2007)

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Low-cost, compact, circular planar dipole UWB antennas have been designed, based on the 'two-penny dipole'. One of the dipole arms has been integrated with the ground plane of a microstrip transmission line, the strip being connected to the other dipole arm. The use of microstrip in stead of stripline technology hardly degrades the radiation characteristics, but simplifies the antenna architecture considerably. Up to 6GHz the azimuthal gain variation does not exceed 3dB. For frequencies in excess of 6GHz the antenna becomes too long, resulting in the forming of elevational lobes and large azimuthal gain variations. Shortening the antenna, results in gain-uniformity in azimuth for high frequencies at the cost of a resonance shift beyond 3GHz. As shown by the first full-wave simulations, this shortening may be realised without compromising the in-band return loss specifications. First measurements performed with antennas realised on FR4 -although hindered by cable-current effects -indicate the correctness of this approach. By inserting a slot in the upper arm of the dipole or inserting a spurline filter in the microstrip part of the antenna, a stop band from 5GHz to 6GHz may be realised.

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Section: Spurline Filter In Microstripmentioning

confidence: 99%

Section: Spurline Filter In Microstripmentioning

confidence: 99%

Low-cost, compact UWB antenna with frequency band-notch function

Visser¹

2007

2nd European Conference on Antennas and Propagation (EuCAP 2007)

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“…The band-notch can be achieved via the antenna design instead of adding new circuits, such as filters, to the communication systems. Many techniques have been proposed and developed to obtain the band-notch property through the antenna design such as; etching different kinds of slots on the patch or on the ground plane [5][6][7], or adding parasitic elements using folded strips to the antenna [8], or inserting a spurline by etching one slot on a microstrip line of the antenna [9][10][11]. Recently, the unwanted frequency bands are notched using resonators such as a split ring resonator (SRR), or its negative image which is a complementary split ring resonator (CSRR) [12][13][14] as well as the spiral loop resonator (SLR) [15].…”

Section: Introductionmentioning

confidence: 99%

A Proximity-Fed Annular Slot Antenna With Different a Band-Notch Manipulations for Ultra-Wide Band Applications

Khaled¹,

Saad²,

Salem³

2012

PIER B

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Abstract-A proximity-fed annular slot antenna for UWB applications with a band rejection using different techniques is presented. The proposed antenna provides an UWB performance in the frequency range of ≈ 2.84 to ≈ 8.2 GHz with relatively stable radiation parameters. Three different techniques to construct a resonant circuit for the proposed antenna are investigated to achieve the band-notch property in the band ≈ 5.11 to ≈ 5.69 GHz band which include the WLAN and HIPERLAN/2 services without degrading the UWB performance of the antenna. Three resonators are considered; a single complementary split ring resonator (CSRR), a complementary spiral loop resonator (CSLR) and a spurline slot. Furthermore, the band-notched resonance frequency and the bandwidth can be easily controlled by adjusting the dimensions of the resonator. The proposed antenna is simulated, fabricated and measured. The measured data show very good agreements with the simulated results. The proposed antenna provides almost omnidirectional patterns, relatively flat gain and high radiation efficiency over the entire UWB frequency excluding the rejected band.

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“…In 1977, Bates realized this filter in microstrip assuming same phase velocities for the even and odd modes [2]. Later, Nguyen presented a detailed analysis considering unequal phase velocities of even and odd modes associated with inhomogeneous microstrip medium [3]. Till now, many variants of spurline filter have been reported for wide-band and better rejection characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…The middle portion of the filter, similar to feed line, is a 50-ohm transmission line on air suspended membrane. The spurline BSF with identical coupled lines in inhomogeneous microstrip configuration was designed using expressions given in[3,6].…”

mentioning

confidence: 99%

Micromachined Spurline Band-stop Filter

Sharma

Koul

Chandra

2007

2007 IEEE International Workshop on Radio-Frequency Integration Technology

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This paper reports the design and fabrication of a membrane-supported spurline band-stop filter. The filter was fabricated using silicon bulk micromachining technique and a CMOS compatible metal/dielectric deposition RF sputtering technique. A closed-form expression of an equivalent value of dielectric constant is also derived and introduced to account for a multi-layer dielectric stack formed as a result of bulk micromachining. The proposed filter shows a better rejection performance and a wider 10-dB rejection bandwidth than the one realized on bulk silicon substrate. The proposed filter exhibits a 10-dB rejection band from 7.9-9.6 GHz with center frequency as 8.6 GHz. The measured rejection level in stop-band is better than 20 dB with maximum rejection level of 31 dB.Index Terms -Band-stop filter (BSF), spurline, dielectric membrane, and bulk micromachining.

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Millimeter Wave Printed Circuit Spurline Filters

Cited by 35 publications

References 3 publications

Low-cost, compact UWB antenna with frequency band-notch function

Low-cost, compact UWB antenna with frequency band-notch function

A Proximity-Fed Annular Slot Antenna With Different a Band-Notch Manipulations for Ultra-Wide Band Applications

Micromachined Spurline Band-stop Filter

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