GB1467233A - Dielectric waveguide filter assemblies - Google Patents

Dielectric waveguide filter assemblies

Info

Publication number
GB1467233A
GB1467233A GB793773A GB793773A GB1467233A GB 1467233 A GB1467233 A GB 1467233A GB 793773 A GB793773 A GB 793773A GB 793773 A GB793773 A GB 793773A GB 1467233 A GB1467233 A GB 1467233A
Authority
GB
United Kingdom
Prior art keywords
coupling
energy
guide
dielectric
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB793773A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Post Office
Original Assignee
Post Office
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Post Office filed Critical Post Office
Priority to GB793773A priority Critical patent/GB1467233A/en
Priority to DE19742407668 priority patent/DE2407668A1/en
Priority to CA192,735A priority patent/CA1029446A/en
Priority to FR7405559A priority patent/FR2218660B1/fr
Priority to US443429A priority patent/US3896402A/en
Priority to JP49019866A priority patent/JPS5041452A/ja
Publication of GB1467233A publication Critical patent/GB1467233A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/52—Systems for transmission between fixed stations via waveguides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/16—Dielectric waveguides, i.e. without a longitudinal conductor

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1467233 Channel-dropping filter POST OFFICE 18 Feb 1974 [19 Feb 1973] 7937/73 Heading H1W A channel dropping filter comprises frequency-responsive directional couplers formed from all-dielectric waveguide. Each coupler provides total coupling of wave energy in a certain band from an input terminal to an output terminal, energy in other bands being propagated to a second output. Fig. 3 shows a self-explanatory scheme for channel-dropping or combination using such couplers. Each coupledline filter (Fig. 1) consists of dielectric waveguides 2, 5 coupled over such an interval and having dielectric constants relative to the medium in which they are immersed such that, at a certain frequency, the whole of the wave energy coupled into one guide appears totally in the other guide at the end of the coupling interval. The condition that the whole of the input energy will appear wholly on one or the other of the two guides at the end of the coupling interval can be stated as where L is the length of the coupling interval and C is the coupling coefficient which is frequency-dependent. If n is even, the output appears on the guide to which it was originally applied, and if n is odd, the energy appears on the other line. Thus the coefficient C may be adjusted to cause the coupler to separate one group of frequencies from another where both groups are applied in common to the same input of the coupler. According to the invention, the cross-sectional dimensions of each waveguide is chosen such that the ratio #g/# 2 lies in the range from where #g is the wavelength of energy in the guides remote from the coupling region, # 2 is the TEM wavelength, E 1 is the dielectric constant of the guides and E 2 the dielectric constant of the medium in which they are immersed. The wavelengths are those associated with the frequency at which total coupling from guide to the other occurs. The dielectric waveguides may be associated with a single ground plane, or two such planes one on either side of the waveguide.
GB793773A 1973-02-19 1973-02-19 Dielectric waveguide filter assemblies Expired GB1467233A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB793773A GB1467233A (en) 1973-02-19 1973-02-19 Dielectric waveguide filter assemblies
DE19742407668 DE2407668A1 (en) 1973-02-19 1974-02-18 ARRANGEMENT FOR SEPARATING THE SIGNALS OF EACH CHANNEL OF A MULTI-CARRIER REMOTE INDICATING SYSTEM
CA192,735A CA1029446A (en) 1973-02-19 1974-02-18 Dielectric waveguide filters
FR7405559A FR2218660B1 (en) 1973-02-19 1974-02-19
US443429A US3896402A (en) 1973-02-19 1974-02-19 Dielectric waveguide filters
JP49019866A JPS5041452A (en) 1973-02-19 1974-02-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB793773A GB1467233A (en) 1973-02-19 1973-02-19 Dielectric waveguide filter assemblies

Publications (1)

Publication Number Publication Date
GB1467233A true GB1467233A (en) 1977-03-16

Family

ID=9842654

Family Applications (1)

Application Number Title Priority Date Filing Date
GB793773A Expired GB1467233A (en) 1973-02-19 1973-02-19 Dielectric waveguide filter assemblies

Country Status (6)

Country Link
US (1) US3896402A (en)
JP (1) JPS5041452A (en)
CA (1) CA1029446A (en)
DE (1) DE2407668A1 (en)
FR (1) FR2218660B1 (en)
GB (1) GB1467233A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091343A (en) * 1975-06-30 1978-05-23 Epsilon Lambda Electronics Corp. Insular waveguide directional coupler
US4097826A (en) * 1975-06-30 1978-06-27 Epsilon Lambda Electronics Corp. Insular waveguide ring resonator filter
US4004257A (en) * 1975-07-09 1977-01-18 Vitek Electronics, Inc. Transmission line filter
JPS5212843A (en) * 1975-07-21 1977-01-31 Hitachi Ltd Optial fiber-branching device
JPS5217837A (en) * 1975-07-31 1977-02-10 Sumitomo Electric Ind Ltd Path for transmitting leakage light
JPS5274359A (en) * 1975-12-18 1977-06-22 Sumitomo Electric Ind Ltd Device for branching optical fiber
JPS52105434U (en) * 1976-02-06 1977-08-11
US4146297A (en) * 1978-01-16 1979-03-27 Bell Telephone Laboratories, Incorporated Tunable optical waveguide directional coupler filter
US4461535A (en) * 1981-10-21 1984-07-24 Bell Telephone Laboratories, Incorporated Wavelength filters
JPS59208509A (en) * 1983-05-13 1984-11-26 Nippon Telegr & Teleph Corp <Ntt> Optical multiplexer for single mode
US4560964A (en) * 1985-02-28 1985-12-24 Eaton Corporation Compact step tuned filter
US4730888A (en) * 1986-02-20 1988-03-15 American Telephone And Telegraph Company, At&T Bell Laboratories Optimized guided wave communication system
US4844573A (en) * 1987-05-22 1989-07-04 Aster Corporation Electro-optical converter including ridgid support for optical fiber coupler, telephone set using the coupler and method of making same
JP3405198B2 (en) 1998-06-10 2003-05-12 株式会社村田製作所 Non-radiative dielectric line resonator, non-radiative dielectric line filter, duplexer using the same, and communication device
CN107910627B (en) * 2017-10-27 2019-12-31 重庆邮电大学 Terahertz directional coupler for H-plane crack waveguide

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2129712A (en) * 1933-12-09 1938-09-13 American Telephone & Telegraph Transmission of energy effects by guided electric waves in a dielectric medium
NL97161C (en) * 1952-03-01
US3157726A (en) * 1960-03-01 1964-11-17 American Optical Corp Optical energy transmitting devices and method of making same
US3558213A (en) * 1969-04-25 1971-01-26 Bell Telephone Labor Inc Optical frequency filters using disc cavity
FR2152464B1 (en) * 1971-09-16 1974-05-31 Thomson Csf

Also Published As

Publication number Publication date
JPS5041452A (en) 1975-04-15
CA1029446A (en) 1978-04-11
FR2218660B1 (en) 1978-02-17
FR2218660A1 (en) 1974-09-13
US3896402A (en) 1975-07-22
DE2407668A1 (en) 1974-08-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee