GB1467233A – Dielectric waveguide filter assemblies
– Google Patents
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
1973-02-19
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.)
1973-02-19
Filing date
1973-02-19
Publication date
1977-03-16
1973-02-19
Application filed by Post Office
filed
Critical
Post Office
1973-02-19
Priority to GB793773A
priority
Critical
patent/GB1467233A/en
1974-02-18
Priority to CA192,735A
priority
patent/CA1029446A/en
1974-02-18
Priority to DE19742407668
priority
patent/DE2407668A1/en
1974-02-19
Priority to FR7405559A
priority
patent/FR2218660B1/fr
1974-02-19
Priority to JP49019866A
priority
patent/JPS5041452A/ja
1974-02-19
Priority to US443429A
priority
patent/US3896402A/en
1977-03-16
Publication of GB1467233A
publication
Critical
patent/GB1467233A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
CA192,735A
CA1029446A
(en)
1973-02-19
1974-02-18
Dielectric waveguide filters
DE19742407668
DE2407668A1
(en)
1973-02-19
1974-02-18
ARRANGEMENT FOR SEPARATING THE SIGNALS OF EACH CHANNEL OF A MULTI-CARRIER REMOTE INDICATING SYSTEM
FR7405559A
FR2218660B1
(en)
1973-02-19
1974-02-19
JP49019866A
JPS5041452A
(en)
1973-02-19
1974-02-19
US443429A
US3896402A
(en)
1973-02-19
1974-02-19
Dielectric waveguide filters
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
US4097826A
(en)
*
1975-06-30
1978-06-27
Epsilon Lambda Electronics Corp.
Insular waveguide ring resonator filter
US4091343A
(en)
*
1975-06-30
1978-05-23
Epsilon Lambda Electronics Corp.
Insular waveguide directional coupler
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
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
1973
1973-02-19
GB
GB793773A
patent/GB1467233A/en
not_active
Expired
1974
1974-02-18
CA
CA192,735A
patent/CA1029446A/en
not_active
Expired
1974-02-18
DE
DE19742407668
patent/DE2407668A1/en
active
Pending
1974-02-19
JP
JP49019866A
patent/JPS5041452A/ja
active
Pending
1974-02-19
FR
FR7405559A
patent/FR2218660B1/fr
not_active
Expired
1974-02-19
US
US443429A
patent/US3896402A/en
not_active
Expired – Lifetime
Also Published As
Publication number
Publication date
FR2218660B1
(en)
1978-02-17
FR2218660A1
(en)
1974-09-13
CA1029446A
(en)
1978-04-11
US3896402A
(en)
1975-07-22
DE2407668A1
(en)
1974-08-29
JPS5041452A
(en)
1975-04-15
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Legal Events
Date
Code
Title
Description
1977-07-27
PS
Patent sealed [section 19, patents act 1949]
1978-02-22
435
Patent endorsed ‘licences of right’ on the date specified (sect. 35/1949)
1979-10-31
PCNP
Patent ceased through non-payment of renewal fee
