US2512368A - Cavity resonator of rectangular prismatic shape - Google Patents

Cavity resonator of rectangular prismatic shape Download PDF

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Publication number
US2512368A
US2512368A US3647A US364748A US2512368A US 2512368 A US2512368 A US 2512368A US 3647 A US3647 A US 3647A US 364748 A US364748 A US 364748A US 2512368 A US2512368 A US 2512368A
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United States
Prior art keywords
cavity resonator
rectangular
prism
prismatic shape
rectangular prismatic
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Expired - Lifetime
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US3647A
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English (en)
Inventor
Niessen Karel Frederik
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators

Definitions

  • This invention relates to a cavity resonator of rectangular prismatic shape. Consequently, the space enclosed by the walls of the resonator has the shape of a rectangular prism.
  • a rectangular prism is a body which is bounded by at least three planes parallel to a determined line and by two planes normal to this line. A cross-section normal to this line is termed perpendicular crosssection and the dimension parallel to this line is called the height of the prism.
  • Cavity resonators of this kind are known in which the perpendicular cross-section of the prism has a square or rectangular shape.
  • the cavity resonator according to the invention exhibits the characteristic that the perpendicular cross-section of the prism is a parallelogram having an angle of 45 and sides in a length ratio of 1: ⁇ /
  • this cavity resonator appears to exhibit a circuit of higher quality with respect to the above-mentioned conventional resonators at the same corresponding lowest natural frequency, the same height of the prism and manufactured from similar material.
  • a detailed exposition of the theory underlying the behavior of the cavity resonator in accordance with the invention, as distinguished from resonators having a transverse cross-section of square or rectangular shape, may be found in the article On a Cavity Resonator of High Quality for the Fundamental Frequency, by K. F. Niessen, in the publication Applied Scientific Research, volume Bl-No. 1-1947, pages 18 through 34.
  • the figure shows a cavity resonator according to the invention in parallel projection, use being made of the rectangular system of axes AX-Y-Z.
  • the cavity resonator is in this case built up from thin plates of conductive material and has the shape of a rectangular prism. All the lateral faces AB--F-E, BCGF, CDI-IG and ADH-E are parallel to the X-axis, whereas the two faces A BC-D and EFGH are normal to the X-axis.
  • the perpendicular cross-section of this prism for example of the bottom face 2 in the figure, is a parallelogram, of which the angle B-AD is 45 and the sides AB and A-D are in the proportion of 1: /2
  • This cavity resonator may be used with advantage if, as is mostly the case, it is desired to utilize the lowest natural frequency for a desired manner of oscillation of a resonator and furthermore a high quality of circuit is required. It may be mentioned that the lowest natural frequency for the envisaged manner of oscillation of the cavity resonator which is obtained by dividing the first-mentioned resonator, by means of a conductive wall into two equal parts. With respect to the cavity resonator ABDEF-H, the volume of the cavity resonator AB CDEF-G--H is twice as large at the same lowest natural frequency for the said manner of oscillation.
  • a cavity resonator adapted to sustain highfrequency electromagnetic oscillations comprising an enclosed conductive chamber for sustaining high frequency oscillations, said chamber being in the form of a six-sided prism having rectangular faces and a transverse cross section in the form of a parallelogram including diametrically opposed 45 degree angles and sides in a length ratio of 1: /2.
  • a cavity resonator adapted to sustain highfrequency electromagnetic oscillations comprising an enclosed chamber for sustaining high frequency oscillations, said chamber being constituted by conductive planar walls arranged to define a six-sided prism, said prism consisting of two pairs of rectangular face walls and one pair of end walls, each of said end walls being shaped as a parallelogram having diametrically opposed 45 degree angles and sides whose lengths exhibit a ratio of In/Z 3.
  • a cavity resonator adapted to sustain high- Irequency electromagnetic oscillations comprising an enclosed chamber for sustaining high frequency oscillations, said chamber being constituted by conductive planar walls arranged to define a six-sided prism, said prism consisting of two pairs of rectangular'face walls and-one- Number 4 pair of end walls, each of said end walls being shaped as a parallelogram having diametrically opposed 45 degree angles and sides whose lengths exhibit a ratio of 1: /2-, and means to excite said chamber with high frequency energy.

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US3647A 1947-02-14 1948-01-21 Cavity resonator of rectangular prismatic shape Expired - Lifetime US2512368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL66152T 1947-02-14

Publications (1)

Publication Number Publication Date
US2512368A true US2512368A (en) 1950-06-20

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ID=31885035

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US3647A Expired - Lifetime US2512368A (en) 1947-02-14 1948-01-21 Cavity resonator of rectangular prismatic shape

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US (1) US2512368A (ko)
BE (1) BE480342A (ko)
CH (1) CH267801A (ko)
DE (1) DE809081C (ko)
FR (1) FR961043A (ko)
GB (1) GB644410A (ko)
NL (1) NL66152C (ko)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2315313A (en) * 1939-09-05 1943-03-30 Gen Electric Cavity resonator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2315313A (en) * 1939-09-05 1943-03-30 Gen Electric Cavity resonator

Also Published As

Publication number Publication date
BE480342A (ko) 1948-08-12
FR961043A (ko) 1950-04-28
NL66152C (ko) 1950-07-15
CH267801A (de) 1950-04-15
GB644410A (en) 1950-10-11
DE809081C (de) 1951-07-23

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