Results 251 to 260 of about 196,486 (281)
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Bandpass grids with annular apertures
IEEE Transactions on Antennas and Propagation, 1987A rigorous theory is developed for describing the diffraction of a plane wave by a doubly periodic array of annular apertures in a thick, perfectly conducting screen. Coaxial waveguide modes are used to describe the fields within each aperture, while the fields above and below the grid are written as plane wave expansions.
A. Roberts, R. C. McPhedran
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2019
In this chapter, a new coupled line balun topology is presented by analyzing the standing wave pattern around the open-circuited half-wavelength transmission line. Then, a class of planar-type balun bandpass filters with single-/dual-band and wideband responses is introduced based on this balun topology.
null Jianpeng Wang +2 more
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In this chapter, a new coupled line balun topology is presented by analyzing the standing wave pattern around the open-circuited half-wavelength transmission line. Then, a class of planar-type balun bandpass filters with single-/dual-band and wideband responses is introduced based on this balun topology.
null Jianpeng Wang +2 more
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IEEE Transactions on Aerospace and Electronic Systems, 1981
In a recent paper [1], Brown examined the sampling of a real finiteenergy bandpass signal having an (angular) bandwidth ? (in radians per second) at the theoretically minimum (average) rate of ?/? samples per second. Following Grace and Pitt's [2] quadrature sampling, a particular case of Kohlenberg's second-order sampling [3, 4], Brown has proved the ...
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In a recent paper [1], Brown examined the sampling of a real finiteenergy bandpass signal having an (angular) bandwidth ? (in radians per second) at the theoretically minimum (average) rate of ?/? samples per second. Following Grace and Pitt's [2] quadrature sampling, a particular case of Kohlenberg's second-order sampling [3, 4], Brown has proved the ...
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Superconductive Bandpass Filters
1994This paper reports on superconductive bandpass filters with several functions or with a high power handling capability. A frequency shift of several megahertz and a successful switching operation due to thermal switches were confirmed in four-pole microstrip filters with a frequency of 1.5 GHz, a bandwidth of 1.5% and a loss of less than 0.7 dB. It was
Yasuhiro Nagai +4 more
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1991
In addition to the RLC tuned circuits of Chapter 8, highly selective bandpass circuits can be achieved with lowpass amplifiers together with resistorcapacitor combinations in overall negative or positive feedback configurations. These active RC configurations are a most interesting study in themselves.
Donald O. Pederson, Kartikeya Mayaram
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In addition to the RLC tuned circuits of Chapter 8, highly selective bandpass circuits can be achieved with lowpass amplifiers together with resistorcapacitor combinations in overall negative or positive feedback configurations. These active RC configurations are a most interesting study in themselves.
Donald O. Pederson, Kartikeya Mayaram
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IEEE Transactions on Microwave Theory and Techniques, 2001
Zolotarev rational functions may be used in certain bandpass filter applications for which two narrower passbands are required. Coupled-resonator low-pass prototypes for narrow bandpass filters based on even- and odd-degree Zolotarev functions are synthesized using a transformed variable.
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Zolotarev rational functions may be used in certain bandpass filter applications for which two narrower passbands are required. Coupled-resonator low-pass prototypes for narrow bandpass filters based on even- and odd-degree Zolotarev functions are synthesized using a transformed variable.
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2001
Warum werden Tiefpassignale in Bandpass-Signale umgewandelt, um sie zu ubertragen? Welche Grunde sprechen fur diesen Modulationsvorgang? Im Kapitel uber die Basisbandubertragung lagen Kanale mit einem Tiepasscharakter vor. Dies hat zur Folge, dass die betrachteten Nachrichtensignale direkt ubertragbar sind, ohne sie zuvor einem Tragersignal ...
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Warum werden Tiefpassignale in Bandpass-Signale umgewandelt, um sie zu ubertragen? Welche Grunde sprechen fur diesen Modulationsvorgang? Im Kapitel uber die Basisbandubertragung lagen Kanale mit einem Tiepasscharakter vor. Dies hat zur Folge, dass die betrachteten Nachrichtensignale direkt ubertragbar sind, ohne sie zuvor einem Tragersignal ...
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2011
The invention relates to a switchable bandpass filter (3). In particular, the invention relates to a narrow-band bandpass filter (3) which can be switched over a broad frequency band and has two filter elements (22, 24) designed with microstrip line technology, which filter is suitable for use as a cosite filter in a compact design which is ...
ROHDE & SCHWARZ +2 more
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The invention relates to a switchable bandpass filter (3). In particular, the invention relates to a narrow-band bandpass filter (3) which can be switched over a broad frequency band and has two filter elements (22, 24) designed with microstrip line technology, which filter is suitable for use as a cosite filter in a compact design which is ...
ROHDE & SCHWARZ +2 more
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